diff --git a/view/book_list.xml b/view/book_list.xml
index 31479c1..487c2d3 100644
--- a/view/book_list.xml
+++ b/view/book_list.xml
@@ -5,5 +5,5 @@ full copyright notices and license terms. -->
 <tree keyword_open="1">
     <field name="rec_name" expand="1"/>
     <field name="balance" sum="1" symbol="currency"/>
-    <field name="state"/>
+    <field name="state" optional="0"/>
 </tree>
diff --git a/view/book_tree.xml b/view/book_tree.xml
index f3cfcb1..1ba5c32 100644
--- a/view/book_tree.xml
+++ b/view/book_tree.xml
@@ -5,7 +5,7 @@ full copyright notices and license terms. -->
 <tree keyword_open="1" tree_state="1">
     <field name="name" expand="1"/>
     <field name="balance" symbol="currency"/>
-    <field name="state"/>
+    <field name="state" optional="0"/>
     <field name="parent" tree_invisible="1"/>
     <field name="childs" tree_invisible="1"/>
 </tree>
diff --git a/view/line_list.xml b/view/line_list.xml
index 4264a57..ab1ddde 100644
--- a/view/line_list.xml
+++ b/view/line_list.xml
@@ -4,14 +4,14 @@ The COPYRIGHT file at the top level of this repository contains the
 full copyright notices and license terms. -->
 <tree>
     <field name="cashbook" tree_invisible="1"/>
-    <field name="number"/>
+    <field name="number" optional="0"/>
     <field name="date"/>
     <field name="payee"/>
     <field name="category_view"/>
     <field name="descr_short" expand="1"/>
-    <field name="credit" sum="1"/>
-    <field name="debit" sum="1"/>
-    <field name="balance"/>
-    <field name="state"/>
+    <field name="credit" sum="1" optional="0"/>
+    <field name="debit" sum="1" optional="0"/>
+    <field name="balance" optional="0"/>
+    <field name="state" optional="0"/>
     <button name="wfcheck"/>
 </tree>
diff --git a/view/line_recon_list.xml b/view/line_recon_list.xml
index 3db758a..0bb87b9 100644
--- a/view/line_recon_list.xml
+++ b/view/line_recon_list.xml
@@ -4,13 +4,13 @@ The COPYRIGHT file at the top level of this repository contains the
 full copyright notices and license terms. -->
 <tree>
     <field name="cashbook" tree_invisible="1"/>
-    <field name="number"/>
-    <field name="date"/>
-    <field name="payee"/>
-    <field name="category_view"/>
-    <field name="descr_short" expand="1"/>
-    <field name="credit" sum="1"/>
-    <field name="debit" sum="1"/>
-    <field name="state"/>
+    <field name="number" optional="0"/>
+    <field name="date" optional="0"/>
+    <field name="payee" optional="0"/>
+    <field name="category_view" optional="0"/>
+    <field name="descr_short" expand="1" optional="0"/>
+    <field name="credit" sum="1" optional="0"/>
+    <field name="debit" sum="1" optional="0"/>
+    <field name="state" optional="0"/>
     <button name="wfrecon"/>
 </tree>
diff --git a/view/recon_list.xml b/view/recon_list.xml
index 2b1248e..c144bc3 100644
--- a/view/recon_list.xml
+++ b/view/recon_list.xml
@@ -4,11 +4,11 @@ The COPYRIGHT file at the top level of this repository contains the
 full copyright notices and license terms. -->
 <tree>
     <field name="cashbook"/>
-    <field name="date"/>
-    <field name="date_from"/>
-    <field name="date_to"/>
-    <field name="start_amount"/>
-    <field name="end_amount"/>
-    <field name="lines"/>
-    <field name="state"/>
+    <field name="date" optional="0"/>
+    <field name="date_from" optional="0"/>
+    <field name="date_to" optional="0"/>
+    <field name="start_amount" optional="0"/>
+    <field name="end_amount" optional="0"/>
+    <field name="lines" optional="0"/>
+    <field name="state" optional="0"/>
 </tree>
diff --git a/view/split_list.xml b/view/split_list.xml
index fc49898..e062d00 100644
--- a/view/split_list.xml
+++ b/view/split_list.xml
@@ -8,7 +8,7 @@ full copyright notices and license terms. -->
     <field name="splittype"/>
     <field name="category"/>
     <field name="booktransf"/>
-    <field name="description" expand="1"/>
-    <field name="amount" sum="1" symbol="currency"/>
-    <field name="amount_2nd_currency" symbol="currency2nd"/>
+    <field name="description" expand="1" optional="0"/>
+    <field name="amount" sum="1" symbol="currency" optional="0"/>
+    <field name="amount_2nd_currency" symbol="currency2nd" optional="0"/>
 </tree>