diff --git a/line.py b/line.py
index 5752c71..f9a4487 100644
--- a/line.py
+++ b/line.py
@@ -90,9 +90,11 @@ class Line(SecondUomMixin, metaclass=PoolMeta):
         """
         recname = super(Line, self).get_rec_name(name)
         if self.cashbook.feature == 'asset':
+            credit = self.quantity_credit if self.quantity_credit is not None else Decimal('0.0')
+            debit = self.quantity_debit if self.quantity_debit is not None else Decimal('0.0')
             recname += '|%(quantity)s %(uom_symbol)s' % {
-                'quantity': Report.format_number(self.quantity or 0.0, None,
-                    digits=self.quantity_digits),
+                'quantity': Report.format_number(credit - debit,
+                    lang=None, digits=self.quantity_digits),
                 'uom_symbol': self.quantity_uom.symbol,
                 }
         return recname
@@ -109,13 +111,17 @@ class Line(SecondUomMixin, metaclass=PoolMeta):
     def get_debit_credit(cls, values, line=None):
         """ compute quantity_debit/quantity_credit from quantity
         """
-        Cashbook = Pool().get('cashbook.book')
+        pool = Pool()
+        Cashbook = pool.get('cashbook.book')
+        Line2 = pool.get('cashbook.line')
 
         result = super(Line, cls).get_debit_credit(values, line)
         if line:
             cashbook = line.cashbook
         else:
             id_cashbook = values.get('cashbook', None)
+            if id_cashbook is None:
+                id_cashbook = Line2.default_cashbook()
             cashbook = None
             if id_cashbook:
                 cashbook = Cashbook.browse([id_cashbook])[0]
@@ -158,9 +164,22 @@ class Line(SecondUomMixin, metaclass=PoolMeta):
 
         if getattr(splitline, 'quantity', None) is not None:
             # we add values to the counterpart of a splitbooking-line
+            asset_books = sum([
+                    1 if splitline.feature == 'asset' else 0,
+                    1 if getattr(splitline.booktransf, 'feature', '-') == 'asset' else 0,
+                ])
+            diff_uom = False
+            if asset_books == 2:
+                diff_uom = (splitline.quantity_uom != splitline.booktransf.quantity_uom) and \
+                (splitline.quantity_uom is not None) and \
+                (splitline.booktransf.quantity_uom is not None)
+
             result.update({
-                'quantity': splitline.quantity,
-                'quantity_2nd_uom': None,
+                'quantity': splitline.quantity_2nd_uom \
+                    if (asset_books == 2) and (diff_uom == True) \
+                    else splitline.quantity,
+                'quantity_2nd_uom': splitline.quantity \
+                    if (asset_books == 2) and (diff_uom == True) else None,
                 })
         elif booktransf_uom is None:
             # counterpart-cashbook has no uom -> no quantity
diff --git a/locale/de.po b/locale/de.po
index ab2b952..9017a1d 100644
--- a/locale/de.po
+++ b/locale/de.po
@@ -172,11 +172,11 @@ msgstr "Anzahl"
 
 msgctxt "field:cashbook.line,quantity_credit:"
 msgid "Quantity Credit"
-msgstr "Anzahl Haben"
+msgstr "Einnahme Anzahl"
 
 msgctxt "field:cashbook.line,quantity_debit:"
 msgid "Quantity Debit"
-msgstr "Anzahl Soll"
+msgstr "Ausgabe Anzahl"
 
 msgctxt "field:cashbook.line,quantity_symbol:"
 msgid "Symbol"
diff --git a/splitline.py b/splitline.py
index 3ac08c5..efeca8b 100644
--- a/splitline.py
+++ b/splitline.py
@@ -7,6 +7,7 @@
 from trytond.pool import PoolMeta, Pool
 from trytond.model import fields
 from trytond.pyson import Eval, Or, And
+from trytond.report import Report
 from trytond.modules.cashbook.line import STATES
 from .mixin import SecondUomMixin
 from .line import STATESQ1, DEPENDSQ1
@@ -34,13 +35,28 @@ class SplitLine(SecondUomMixin, metaclass=PoolMeta):
         readonly=True, model_name='product.uom'),
         'on_change_with_quantity_uom')
 
-    @fields.depends('line', '_parent_line.cashbook')
+    def get_rec_name(self, name):
+        """ add quantities - if its a asset-cashbook
+        """
+        recname = super(SplitLine, self).get_rec_name(name)
+        if self.line.cashbook.feature == 'asset':
+            recname += '|%(quantity)s %(uom_symbol)s' % {
+                'quantity': Report.format_number(self.quantity or 0.0, None,
+                    digits=self.quantity_digits),
+                'uom_symbol': self.quantity_uom.symbol,
+                }
+        return recname
+
+    @fields.depends('line', '_parent_line.cashbook', 'booktransf', '_parent_booktransf.quantity_uom')
     def on_change_with_quantity_uom(self, name=None):
         """ get quantity-unit of asset
         """
         if self.line:
             if self.line.cashbook.quantity_uom:
                 return self.cashbook.quantity_uom.id
+        if self.booktransf:
+            if self.booktransf.quantity_uom:
+                return self.booktransf.quantity_uom.id
 
     @fields.depends('line', '_parent_line.cashbook')
     def on_change_with_quantity_digits(self, name=None):
diff --git a/tests/test_book.py b/tests/test_book.py
index 9a93626..463b2d0 100644
--- a/tests/test_book.py
+++ b/tests/test_book.py
@@ -779,7 +779,7 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
         self.assertEqual(book2.rec_name, 'Asset-Book | -1.00 usd | Open | -1.5000 u')
         self.assertEqual(len(book2.lines), 1)
         self.assertEqual(book2.lines[0].rec_name,
-            '05/01/2022|to|-1.00 usd|Transfer In [Book 1 | 1.00 usd | Open]|1.5000 u')
+            '05/01/2022|to|-1.00 usd|Transfer In [Book 1 | 1.00 usd | Open]|-1.5000 u')
         self.assertEqual(book2.lines[0].state, 'check')
         self.assertEqual(book2.lines[0].bookingtype, 'mvout')
         self.assertEqual(book2.lines[0].feature, 'asset')
@@ -904,7 +904,7 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
         self.assertEqual(book2.rec_name, 'Asset-Book 1 | -1.00 usd | Open | -1.5000 u')
         self.assertEqual(len(book2.lines), 1)
         self.assertEqual(book2.lines[0].rec_name,
-            '05/01/2022|to|-1.00 usd|Transfer In [Asset-Book 2 | 1.00 usd | Open | 1.5000 u]|1.5000 u')
+            '05/01/2022|to|-1.00 usd|Transfer In [Asset-Book 2 | 1.00 usd | Open | 1.5000 u]|-1.5000 u')
         self.assertEqual(book2.lines[0].state, 'check')
         self.assertEqual(book2.lines[0].bookingtype, 'mvout')
         self.assertEqual(book2.lines[0].feature, 'asset')
@@ -1068,7 +1068,7 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
         self.assertEqual(book2.rec_name, 'Asset-Book 1 | -1.00 usd | Open | -42.5243 g')
         self.assertEqual(len(book2.lines), 1)
         self.assertEqual(book2.lines[0].rec_name,
-            '05/01/2022|to|-1.00 usd|Transfer In [Asset-Book 2 | 1.00 usd | Open | 1.5000 oz]|42.5243 g')
+            '05/01/2022|to|-1.00 usd|Transfer In [Asset-Book 2 | 1.00 usd | Open | 1.5000 oz]|-42.5243 g')
         self.assertEqual(book2.lines[0].state, 'check')
         self.assertEqual(book2.lines[0].bookingtype, 'mvout')
         self.assertEqual(book2.lines[0].feature, 'asset')
@@ -1392,18 +1392,887 @@ class CbInvTestCase(CashbookTestCase, InvestmentTestCase):
             'Book 2 | -6.00 usd | Open | -2.50 u')
         self.assertEqual(len(books[0].lines[0].references), 1)
         self.assertEqual(books[0].lines[0].references[0].rec_name,
-            '05/01/2022|to|-6.00 usd|from cashbook [Book 1 | 11.00 usd | Open | 4.00 u]|2.50 u')
+            '05/01/2022|to|-6.00 usd|from cashbook [Book 1 | 11.00 usd | Open | 4.00 u]|-2.50 u')
         self.assertEqual(books[0].lines[0].reference, None)
 
         self.assertEqual(books[1].rec_name, 'Book 2 | -6.00 usd | Open | -2.50 u')
         self.assertEqual(books[1].balance_all, Decimal('-6.0'))
         self.assertEqual(len(books[1].lines), 1)
         self.assertEqual(books[1].lines[0].rec_name,
-            '05/01/2022|to|-6.00 usd|from cashbook [Book 1 | 11.00 usd | Open | 4.00 u]|2.50 u')
+            '05/01/2022|to|-6.00 usd|from cashbook [Book 1 | 11.00 usd | Open | 4.00 u]|-2.50 u')
+
+    @with_transaction()
+    def test_assetbook_split_in_catergory_asset_diff_unit(self):
+        """ splitbooking incoming to asset-cahbook,
+            from category and asset-cashbook with different
+            unit
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types = self.prep_type()
+        BType.write(*[
+            [types],
+            {
+                'feature': 'asset',
+            }])
+        category = self.prep_category(cattype='in')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+
+        # set product to ounce
+        ounce, = Uom.search([('symbol', '=', 'oz')])
+        gram, = Uom.search([('symbol', '=', 'g')])
+
+        ProdTempl.write(*[
+            [asset.product.template],
+            {
+                'default_uom': ounce.id,
+                'name': 'Aurum',
+            }])
+
+        Asset.write(*[
+            [asset],
+            {
+                'uom': ounce.id,
+                'rates': [('create', [{
+                    'date': date(2022, 5, 1),
+                    'rate': Decimal('1750.0'),
+                    }, ])],
+            }])
+        self.assertEqual(asset.rec_name, 'Aurum | 1,750.0000 usd/oz | 05/01/2022')
+
+        (usd, euro) = self.prep_2nd_currency(company)
+        self.assertEqual(company.currency.rec_name, 'Euro')
+        self.assertEqual(asset.symbol, 'usd/oz')
+
+        books = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book ounce|usd',
+            'btype': types.id,
+            'company': company.id,
+            'currency': usd.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': ounce.id,
+            'quantity_digits': 3,
+            }, {
+            'start_date': date(2022, 4, 1),
+            'name': 'Book gram|euro',
+            'btype': types.id,
+            'company': company.id,
+            'currency': euro.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': gram.id,
+            'quantity_digits': 3,
+            }])
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | 0.00 usd | Open | 0.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[0].lines), 0)
+        self.assertEqual(books[1].rec_name, 'Book gram|euro | 0.00 € | Open | 0.000 g')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        Book.write(*[
+            [books[0]],
+            {
+                'lines': [('create', [{
+                    'bookingtype': 'spin',
+                    'date': date(2022, 5, 1),
+                    'splitlines': [('create', [{
+                        'amount': Decimal('5.0'),
+                        'splittype': 'cat',
+                        'description': 'from category',
+                        'category': category.id,
+                        'quantity': Decimal('1.5'),
+                        }, {
+                        'amount': Decimal('6.0'),
+                        'splittype': 'tr',
+                        'description': 'from cashbook',
+                        'booktransf': books[1].id,
+                        'quantity': Decimal('2.5'),
+                        }])],
+                    }])],
+            }])
+
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | 11.00 usd | Open | 4.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('11.0'))
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Rev/Sp|11.00 usd|- [-]|4.000 oz')
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Rev/Sp|5.00 usd|from category [Cat1]|1.500 oz')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Rev/Sp|6.00 usd|from cashbook [Book gram|euro | 0.00 € | Open | 0.000 g]|2.500 oz')
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity_2nd_uom, Decimal('70.874'))
+
+        self.assertEqual(books[1].rec_name, 'Book gram|euro | 0.00 € | Open | 0.000 g')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        Line.wfcheck([books[0].lines[0]])
+
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | 11.00 usd | Open | 4.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('11.0'))
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Rev/Sp|11.00 usd|- [-]|4.000 oz')
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Rev/Sp|5.00 usd|from category [Cat1]|1.500 oz')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Rev/Sp|6.00 usd|from cashbook [Book gram|euro | -5.71 € | Open | -70.874 g]|2.500 oz')
+
+        self.assertEqual(books[1].rec_name, 'Book gram|euro | -5.71 € | Open | -70.874 g')
+        self.assertEqual(books[1].balance_all, Decimal('-5.71'))
+        self.assertEqual(len(books[1].lines), 1)
+        self.assertEqual(books[1].lines[0].rec_name,
+            '05/01/2022|to|-5.71 €|from cashbook [Book ounce|usd | 11.00 usd | Open | 4.000 oz]|-70.874 g')
+
+    @with_transaction()
+    def test_assetbook_split_in_catergory_asset_diff_unit_diff_cat(self):
+        """ splitbooking incoming to asset-cahbook,
+            from category and asset-cashbook with different
+            unit and different uom-category
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types = self.prep_type()
+        BType.write(*[
+            [types],
+            {
+                'feature': 'asset',
+            }])
+        category = self.prep_category(cattype='in')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset1 = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+        asset2 = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product Liter'))
+
+        # set product to ounce
+        ounce, = Uom.search([('symbol', '=', 'oz')])
+        liter, = Uom.search([('symbol', '=', 'l')])
+
+        ProdTempl.write(*[
+            [asset1.product.template],
+            {
+                'default_uom': ounce.id,
+                'name': 'Aurum',
+            },
+            [asset2.product.template],
+            {
+                'default_uom': liter.id,
+                'name': 'Liquid',
+            },
+            ])
+
+        Asset.write(*[
+            [asset1],
+            {
+                'uom': ounce.id,
+                'rates': [('create', [{
+                    'date': date(2022, 5, 1),
+                    'rate': Decimal('1750.0'),
+                    }, ])],
+            },
+            [asset2],
+            {
+                'uom': liter.id,
+                'rates': [('create', [{
+                    'date': date(2022, 5, 1),
+                    'rate': Decimal('10.0'),
+                    }, ])],
+            },
+            ])
+        self.assertEqual(asset1.rec_name, 'Aurum | 1,750.0000 usd/oz | 05/01/2022')
+        self.assertEqual(asset2.rec_name, 'Liquid | 10.0000 usd/l | 05/01/2022')
+
+        (usd, euro) = self.prep_2nd_currency(company)
+        self.assertEqual(company.currency.rec_name, 'Euro')
+        self.assertEqual(asset1.symbol, 'usd/oz')
+        self.assertEqual(asset2.symbol, 'usd/l')
+
+        books = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book ounce|usd',
+            'btype': types.id,
+            'company': company.id,
+            'currency': usd.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset1.id,
+            'quantity_uom': ounce.id,
+            'quantity_digits': 3,
+            }, {
+            'start_date': date(2022, 4, 1),
+            'name': 'Book liter|euro',
+            'btype': types.id,
+            'company': company.id,
+            'currency': euro.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset2.id,
+            'quantity_uom': liter.id,
+            'quantity_digits': 3,
+            }])
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | 0.00 usd | Open | 0.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[0].lines), 0)
+        self.assertEqual(books[1].rec_name, 'Book liter|euro | 0.00 € | Open | 0.000 l')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        self.assertRaisesRegex(UserError,
+            r"Cannot transfer quantities between cashbooks with different unit-categories \(Weight != Volume\).",
+            Book.write,
+            *[
+                [books[0]],
+                {
+                    'lines': [('create', [{
+                        'bookingtype': 'spin',
+                        'date': date(2022, 5, 1),
+                        'splitlines': [('create', [{
+                            'amount': Decimal('5.0'),
+                            'splittype': 'cat',
+                            'description': 'from category',
+                            'category': category.id,
+                            'quantity': Decimal('1.5'),
+                            }, {
+                            'amount': Decimal('6.0'),
+                            'splittype': 'tr',
+                            'description': 'from cashbook',
+                            'booktransf': books[1].id,
+                            'quantity': Decimal('2.5'),
+                            }])],
+                        }])],
+                },
+            ])
+
+    @with_transaction()
+    def test_assetbook_split_out_category(self):
+        """ splitbooking outgoing with asset
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types = self.prep_type()
+        BType.write(*[
+            [types],
+            {
+                'feature': 'asset',
+            }])
+        category = self.prep_category(cattype='out')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+        self.assertEqual(asset.symbol, 'usd/u')
+
+        book, = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book 1',
+            'btype': types.id,
+            'company': company.id,
+            'currency': company.currency.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': asset.uom.id,
+            'quantity_digits': 2,
+            }])
+
+        Book.write(*[
+            [book],
+            {
+                'lines': [('create', [{
+                    'bookingtype': 'spout',
+                    'date': date(2022, 5, 1),
+                    'splitlines': [('create', [{
+                        'amount': Decimal('5.0'),
+                        'splittype': 'cat',
+                        'description': 'to category',
+                        'category': category.id,
+                        'quantity': Decimal('1.5'),
+                        }, {
+                        'amount': Decimal('6.0'),
+                        'splittype': 'cat',
+                        'description': 'to category',
+                        'category': category.id,
+                        'quantity': Decimal('2.5'),
+                        }])],
+                    }])],
+            }])
+
+        self.assertEqual(book.rec_name, 'Book 1 | -11.00 usd | Open | -4.00 u')
+        self.assertEqual(book.balance_all, Decimal('-11.0'))
+        self.assertEqual(len(book.lines), 1)
+        self.assertEqual(book.lines[0].splitline_has_quantity, False)
+        self.assertEqual(book.lines[0].rec_name, '05/01/2022|Exp/Sp|-11.00 usd|- [-]|-4.00 u')
+
+        self.assertEqual(len(book.lines[0].splitlines), 2)
+        self.assertEqual(book.lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]|1.50 u')
+        self.assertEqual(book.lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to category [Cat1]|2.50 u')
+
+    @with_transaction()
+    def test_assetbook_split_out_category_and_assetbook(self):
+        """ splitbooking outgoing,
+            from asset-cashbook to asset-cahbook and to category
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types = self.prep_type()
+        BType.write(*[
+            [types],
+            {
+                'feature': 'asset',
+            }])
+        category = self.prep_category(cattype='out')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+        self.assertEqual(asset.symbol, 'usd/u')
+
+        books = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book 1',
+            'btype': types.id,
+            'company': company.id,
+            'currency': company.currency.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': asset.uom.id,
+            'quantity_digits': 2,
+            }, {
+            'start_date': date(2022, 4, 1),
+            'name': 'Book 2',
+            'btype': types.id,
+            'company': company.id,
+            'currency': company.currency.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': asset.uom.id,
+            'quantity_digits': 2,
+            }])
+
+        Book.write(*[
+            [books[0]],
+            {
+                'lines': [('create', [{
+                    'bookingtype': 'spout',
+                    'date': date(2022, 5, 1),
+                    'splitlines': [('create', [{
+                        'amount': Decimal('5.0'),
+                        'splittype': 'cat',
+                        'description': 'to category',
+                        'category': category.id,
+                        'quantity': Decimal('1.5'),
+                        }, {
+                        'amount': Decimal('6.0'),
+                        'splittype': 'tr',
+                        'description': 'to cashbook',
+                        'booktransf': books[1].id,
+                        'quantity': Decimal('2.5'),
+                        }])],
+                    }])],
+            }])
+
+        self.assertEqual(books[0].rec_name, 'Book 1 | -11.00 usd | Open | -4.00 u')
+        self.assertEqual(books[0].balance_all, Decimal('-11.0'))
+
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Exp/Sp|-11.00 usd|- [-]|-4.00 u')
+        self.assertEqual(books[0].lines[0].splitline_has_quantity, True)
+
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]|1.50 u')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to cashbook [Book 2 | 0.00 usd | Open | 0.00 u]|2.50 u')
+
+        self.assertEqual(len(books[0].lines[0].references), 0)
+        self.assertEqual(books[0].lines[0].reference, None)
+
+        self.assertEqual(books[1].rec_name, 'Book 2 | 0.00 usd | Open | 0.00 u')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        Line.wfcheck([books[0].lines[0]])
+
+        self.assertEqual(books[0].rec_name, 'Book 1 | -11.00 usd | Open | -4.00 u')
+        self.assertEqual(books[0].balance_all, Decimal('-11.0'))
+        self.assertEqual(len(books[0].lines), 1)
+
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Exp/Sp|-11.00 usd|- [-]|-4.00 u')
+        self.assertEqual(books[0].lines[0].splitline_has_quantity, True)
+
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]|1.50 u')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to cashbook [Book 2 | 6.00 usd | Open | 2.50 u]|2.50 u')
+        self.assertEqual(books[0].lines[0].splitlines[1].amount, Decimal('6.0'))
+        self.assertEqual(books[0].lines[0].splitlines[1].amount_2nd_currency, None)
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity2nd, None)
+        self.assertEqual(books[0].lines[0].splitlines[1].booktransf.rec_name,
+            'Book 2 | 6.00 usd | Open | 2.50 u')
+        self.assertEqual(len(books[0].lines[0].references), 1)
+        self.assertEqual(books[0].lines[0].references[0].rec_name,
+            '05/01/2022|from|6.00 usd|to cashbook [Book 1 | -11.00 usd | Open | -4.00 u]|2.50 u')
+        self.assertEqual(books[0].lines[0].reference, None)
+
+        self.assertEqual(books[1].rec_name, 'Book 2 | 6.00 usd | Open | 2.50 u')
+        self.assertEqual(books[1].balance_all, Decimal('6.0'))
+        self.assertEqual(len(books[1].lines), 1)
+        self.assertEqual(books[1].lines[0].rec_name,
+            '05/01/2022|from|6.00 usd|to cashbook [Book 1 | -11.00 usd | Open | -4.00 u]|2.50 u')
+
+    @with_transaction()
+    def test_assetbook_split_out_category_and_assetbook2(self):
+        """ splitbooking outgoing,
+            from cashbook to asset-cahbook and to category
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types_asset = self.prep_type()
+        BType.write(*[
+            [types_asset],
+            {
+                'feature': 'asset',
+                'name': 'Asset',
+                'short': 'as',
+            }])
+        types_cash = self.prep_type()
+        self.assertEqual(types_cash.rec_name, 'CAS - Cash')
+        self.assertEqual(types_asset.rec_name, 'as - Asset')
+        category = self.prep_category(cattype='out')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+        self.assertEqual(asset.symbol, 'usd/u')
+
+        books = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book Cash',
+            'btype': types_cash.id,
+            'company': company.id,
+            'currency': company.currency.id,
+            'number_sequ': self.prep_sequence().id,
+            }, {
+            'start_date': date(2022, 4, 1),
+            'name': 'Book Asset',
+            'btype': types_asset.id,
+            'company': company.id,
+            'currency': company.currency.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': asset.uom.id,
+            'quantity_digits': 2,
+            }])
+
+        Book.write(*[
+            [books[0]],
+            {
+                'lines': [('create', [{
+                    'bookingtype': 'spout',
+                    'date': date(2022, 5, 1),
+                    'splitlines': [('create', [{
+                        'amount': Decimal('5.0'),
+                        'splittype': 'cat',
+                        'description': 'to category',
+                        'category': category.id,
+                        }, {
+                        'amount': Decimal('6.0'),
+                        'splittype': 'tr',
+                        'description': 'to cashbook',
+                        'booktransf': books[1].id,
+                        'quantity': Decimal('2.5'),
+                        }])],
+                    }])],
+            }])
+
+        self.assertEqual(books[0].rec_name, 'Book Cash | -11.00 usd | Open')
+        self.assertEqual(books[0].balance_all, Decimal('-11.0'))
+
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Exp/Sp|-11.00 usd|- [-]')
+        self.assertEqual(books[0].lines[0].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].quantity_credit, None)
+        self.assertEqual(books[0].lines[0].quantity_debit, None)
+        self.assertEqual(books[0].lines[0].quantity_2nd_uom, None)
+        self.assertEqual(books[0].lines[0].splitline_has_quantity, True)
+
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]')
+        self.assertEqual(books[0].lines[0].splitlines[0].quantity, None)
+        self.assertEqual(books[0].lines[0].splitlines[0].quantity_2nd_uom, None)
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to cashbook [Book Asset | 0.00 usd | Open | 0.00 u]')
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity_2nd_uom, None)
+
+        self.assertEqual(len(books[0].lines[0].references), 0)
+        self.assertEqual(books[0].lines[0].reference, None)
+
+        self.assertEqual(books[1].rec_name, 'Book Asset | 0.00 usd | Open | 0.00 u')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        Line.wfcheck([books[0].lines[0]])
+
+        self.assertEqual(books[0].rec_name, 'Book Cash | -11.00 usd | Open')
+        self.assertEqual(books[0].balance_all, Decimal('-11.0'))
+        self.assertEqual(len(books[0].lines), 1)
+
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Exp/Sp|-11.00 usd|- [-]')
+        self.assertEqual(books[0].lines[0].splitline_has_quantity, True)
+        self.assertEqual(books[0].lines[0].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].quantity_credit, None)
+        self.assertEqual(books[0].lines[0].quantity_debit, None)
+        self.assertEqual(books[0].lines[0].quantity_2nd_uom, None)
+
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to cashbook [Book Asset | 6.00 usd | Open | 2.50 u]')
+        self.assertEqual(books[0].lines[0].splitlines[1].amount, Decimal('6.0'))
+        self.assertEqual(books[0].lines[0].splitlines[1].amount_2nd_currency, None)
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity2nd, None)
+        self.assertEqual(books[0].lines[0].splitlines[1].booktransf.rec_name,
+            'Book Asset | 6.00 usd | Open | 2.50 u')
+        self.assertEqual(len(books[0].lines[0].references), 1)
+        self.assertEqual(books[0].lines[0].references[0].rec_name,
+            '05/01/2022|from|6.00 usd|to cashbook [Book Cash | -11.00 usd | Open]|2.50 u')
+        self.assertEqual(books[0].lines[0].reference, None)
+
+        self.assertEqual(books[1].rec_name, 'Book Asset | 6.00 usd | Open | 2.50 u')
+        self.assertEqual(books[1].balance_all, Decimal('6.0'))
+        self.assertEqual(len(books[1].lines), 1)
+        self.assertEqual(books[1].lines[0].rec_name,
+            '05/01/2022|from|6.00 usd|to cashbook [Book Cash | -11.00 usd | Open]|2.50 u')
+
+    @with_transaction()
+    def test_assetbook_split_out_catergory_asset_diff_unit(self):
+        """ splitbooking outgoing to asset-cahbook,
+            to category and asset-cashbook with different
+            unit
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types = self.prep_type()
+        BType.write(*[
+            [types],
+            {
+                'feature': 'asset',
+            }])
+        category = self.prep_category(cattype='out')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+
+        # set product to ounce
+        ounce, = Uom.search([('symbol', '=', 'oz')])
+        gram, = Uom.search([('symbol', '=', 'g')])
+
+        ProdTempl.write(*[
+            [asset.product.template],
+            {
+                'default_uom': ounce.id,
+                'name': 'Aurum',
+            }])
+
+        Asset.write(*[
+            [asset],
+            {
+                'uom': ounce.id,
+                'rates': [('create', [{
+                    'date': date(2022, 5, 1),
+                    'rate': Decimal('1750.0'),
+                    }, ])],
+            }])
+        self.assertEqual(asset.rec_name, 'Aurum | 1,750.0000 usd/oz | 05/01/2022')
+
+        (usd, euro) = self.prep_2nd_currency(company)
+        self.assertEqual(company.currency.rec_name, 'Euro')
+        self.assertEqual(asset.symbol, 'usd/oz')
+
+        books = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book ounce|usd',
+            'btype': types.id,
+            'company': company.id,
+            'currency': usd.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': ounce.id,
+            'quantity_digits': 3,
+            }, {
+            'start_date': date(2022, 4, 1),
+            'name': 'Book gram|euro',
+            'btype': types.id,
+            'company': company.id,
+            'currency': euro.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset.id,
+            'quantity_uom': gram.id,
+            'quantity_digits': 3,
+            }])
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | 0.00 usd | Open | 0.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[0].lines), 0)
+        self.assertEqual(books[1].rec_name, 'Book gram|euro | 0.00 € | Open | 0.000 g')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        Book.write(*[
+            [books[0]],
+            {
+                'lines': [('create', [{
+                    'bookingtype': 'spout',
+                    'date': date(2022, 5, 1),
+                    'splitlines': [('create', [{
+                        'amount': Decimal('5.0'),
+                        'splittype': 'cat',
+                        'description': 'to category',
+                        'category': category.id,
+                        'quantity': Decimal('1.5'),
+                        }, {
+                        'amount': Decimal('6.0'),
+                        'splittype': 'tr',
+                        'description': 'to cashbook',
+                        'booktransf': books[1].id,
+                        'quantity': Decimal('2.5'),
+                        }])],
+                    }])],
+            }])
+
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | -11.00 usd | Open | -4.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('-11.0'))
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Exp/Sp|-11.00 usd|- [-]|-4.000 oz')
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]|1.500 oz')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to cashbook [Book gram|euro | 0.00 € | Open | 0.000 g]|2.500 oz')
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity, Decimal('2.5'))
+        self.assertEqual(books[0].lines[0].splitlines[1].quantity_2nd_uom, Decimal('70.874'))
+
+        self.assertEqual(books[1].rec_name, 'Book gram|euro | 0.00 € | Open | 0.000 g')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        Line.wfcheck([books[0].lines[0]])
+
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | -11.00 usd | Open | -4.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('-11.0'))
+        self.assertEqual(len(books[0].lines), 1)
+        self.assertEqual(books[0].lines[0].rec_name,
+            '05/01/2022|Exp/Sp|-11.00 usd|- [-]|-4.000 oz')
+        self.assertEqual(len(books[0].lines[0].splitlines), 2)
+        self.assertEqual(books[0].lines[0].splitlines[0].rec_name,
+            'Exp/Sp|5.00 usd|to category [Cat1]|1.500 oz')
+        self.assertEqual(books[0].lines[0].splitlines[1].rec_name,
+            'Exp/Sp|6.00 usd|to cashbook [Book gram|euro | 5.71 € | Open | 70.874 g]|2.500 oz')
+
+        self.assertEqual(books[1].rec_name, 'Book gram|euro | 5.71 € | Open | 70.874 g')
+        self.assertEqual(books[1].balance_all, Decimal('5.71'))
+        self.assertEqual(len(books[1].lines), 1)
+        self.assertEqual(books[1].lines[0].rec_name,
+            '05/01/2022|from|5.71 €|to cashbook [Book ounce|usd | -11.00 usd | Open | -4.000 oz]|70.874 g')
+
+    @with_transaction()
+    def test_assetbook_split_out_catergory_asset_diff_unit_diff_cat(self):
+        """ splitbooking outgoing to asset-cahbook,
+            to category and asset-cashbook with different
+            unit and different uom-category
+        """
+        pool = Pool()
+        Book = pool.get('cashbook.book')
+        Line = pool.get('cashbook.line')
+        BType = pool.get('cashbook.type')
+        Asset = pool.get('investment.asset')
+        ProdTempl = pool.get('product.template')
+        Uom = pool.get('product.uom')
+
+        types = self.prep_type()
+        BType.write(*[
+            [types],
+            {
+                'feature': 'asset',
+            }])
+        category = self.prep_category(cattype='out')
+
+        company = self.prep_company()
+        party = self.prep_party()
+        asset1 = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product 1'))
+        asset2 = self.prep_asset_item(
+            company=company,
+            product = self.prep_asset_product(name='Product Liter'))
+
+        # set product to ounce
+        ounce, = Uom.search([('symbol', '=', 'oz')])
+        liter, = Uom.search([('symbol', '=', 'l')])
+
+        ProdTempl.write(*[
+            [asset1.product.template],
+            {
+                'default_uom': ounce.id,
+                'name': 'Aurum',
+            },
+            [asset2.product.template],
+            {
+                'default_uom': liter.id,
+                'name': 'Liquid',
+            },
+            ])
+
+        Asset.write(*[
+            [asset1],
+            {
+                'uom': ounce.id,
+                'rates': [('create', [{
+                    'date': date(2022, 5, 1),
+                    'rate': Decimal('1750.0'),
+                    }, ])],
+            },
+            [asset2],
+            {
+                'uom': liter.id,
+                'rates': [('create', [{
+                    'date': date(2022, 5, 1),
+                    'rate': Decimal('10.0'),
+                    }, ])],
+            },
+            ])
+        self.assertEqual(asset1.rec_name, 'Aurum | 1,750.0000 usd/oz | 05/01/2022')
+        self.assertEqual(asset2.rec_name, 'Liquid | 10.0000 usd/l | 05/01/2022')
+
+        (usd, euro) = self.prep_2nd_currency(company)
+        self.assertEqual(company.currency.rec_name, 'Euro')
+        self.assertEqual(asset1.symbol, 'usd/oz')
+        self.assertEqual(asset2.symbol, 'usd/l')
+
+        books = Book.create([{
+            'start_date': date(2022, 4, 1),
+            'name': 'Book ounce|usd',
+            'btype': types.id,
+            'company': company.id,
+            'currency': usd.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset1.id,
+            'quantity_uom': ounce.id,
+            'quantity_digits': 3,
+            }, {
+            'start_date': date(2022, 4, 1),
+            'name': 'Book liter|euro',
+            'btype': types.id,
+            'company': company.id,
+            'currency': euro.id,
+            'number_sequ': self.prep_sequence().id,
+            'asset': asset2.id,
+            'quantity_uom': liter.id,
+            'quantity_digits': 3,
+            }])
+        self.assertEqual(books[0].rec_name, 'Book ounce|usd | 0.00 usd | Open | 0.000 oz')
+        self.assertEqual(books[0].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[0].lines), 0)
+        self.assertEqual(books[1].rec_name, 'Book liter|euro | 0.00 € | Open | 0.000 l')
+        self.assertEqual(books[1].balance_all, Decimal('0.0'))
+        self.assertEqual(len(books[1].lines), 0)
+
+        self.assertRaisesRegex(UserError,
+            r"Cannot transfer quantities between cashbooks with different unit-categories \(Weight != Volume\).",
+            Book.write,
+            *[
+                [books[0]],
+                {
+                    'lines': [('create', [{
+                        'bookingtype': 'spout',
+                        'date': date(2022, 5, 1),
+                        'splitlines': [('create', [{
+                            'amount': Decimal('5.0'),
+                            'splittype': 'cat',
+                            'description': 'from category',
+                            'category': category.id,
+                            'quantity': Decimal('1.5'),
+                            }, {
+                            'amount': Decimal('6.0'),
+                            'splittype': 'tr',
+                            'description': 'from cashbook',
+                            'booktransf': books[1].id,
+                            'quantity': Decimal('2.5'),
+                            }])],
+                        }])],
+                },
+            ])
 
     # TODO:
-    # - splitbuchung mit unterschiedlichen einheiten einer kategorie
-    # - splitbuchung mit unterschiedlichen einheiten verschiedener kategorien
     # in/out-splitbuchung
 
 # end CbInvTestCase
diff --git a/view/split_form.xml b/view/split_form.xml
index f0e457c..0602d50 100644
--- a/view/split_form.xml
+++ b/view/split_form.xml
@@ -7,10 +7,13 @@ full copyright notices and license terms. -->
     <xpath expr="/form/field[@name='rate_2nd_currency']" position="after">
         <label name="quantity" />
         <field name="quantity" symbol="quantity_uom"/>
-        <label name="factor_2nd_uom"/>
-        <field name="factor_2nd_uom"/>
         <field name="quantity_digits"/>
         <newline/>
+
+        <label name="quantity_2nd_uom"/>
+        <field name="quantity_2nd_uom" symbol="quantity2nd"/>
+        <label name="factor_2nd_uom"/>
+        <field name="factor_2nd_uom"/>
     </xpath>
 
 </data>
diff --git a/view/split_list.xml b/view/split_list.xml
index a2a4280..876e52d 100644
--- a/view/split_list.xml
+++ b/view/split_list.xml
@@ -4,11 +4,9 @@ The COPYRIGHT file at the top level of this repository contains the
 full copyright notices and license terms. -->
 <data>
 
-    <xpath expr="/tree/field[@name='currency2nd']" position="after">
-        <field name="quantity"/>
-        <field name="quantity_uom"/>
-        <field name="quantity_2nd_uom"/>
-        <field name="quantity2nd"/>
+    <xpath expr="/tree/field[@name='amount_2nd_currency']" position="after">
+        <field name="quantity" symbol="quantity_uom"/>
+        <field name="quantity_2nd_uom" symbol="quantity2nd"/>
     </xpath>
 
 </data>