Index: development/models/lbx/LBX Configurator,1.0.0.xml
===================================================================
diff -u -r4512 -r4532
--- development/models/lbx/LBX Configurator,1.0.0.xml	(.../LBX Configurator,1.0.0.xml)	(revision 4512)
+++ development/models/lbx/LBX Configurator,1.0.0.xml	(.../LBX Configurator,1.0.0.xml)	(revision 4532)
@@ -177,7 +177,7 @@
                     <OPTION ID="F" LABEL="ProductieWijze_F" />
                   </OPTIONS>
                 </PROPERTY>
-                <PROPERTY ID="RugHoogte" LABEL="RugHoogte" TYPE="String" ENABLED="false" ANALYZE="true" SEQNO="27" USED="1:85,86,124,125,128,131,145,146,148,154,242,251">
+                <PROPERTY ID="RugHoogte" LABEL="RugHoogte" TYPE="String" ENABLED="false" ANALYZE="true" SEQNO="27" USED="1:84,85,86,124,125,128,131,145,146,148,154,242,251">
                   <OPTIONS>
                     <OPTION ID="N" LABEL="RugHoogte_N" />
                     <OPTION ID="M" LABEL="RugHoogte_M" />
@@ -5325,7 +5325,7 @@
         <LHS>;data.berekendewaarden.voorwandverhoginghoogte@value;</LHS>
       </RULE>
       <RULE LABEL="Bereken Rughoogte">
-        <CONDITION>BEHAVIOR.IsInteractive</CONDITION>
+        <CONDITION>(BEHAVIOR.IsInteractive or (DATA.Kenmerken.RugHoogte == ""))</CONDITION>
         <IMPLICATION>
 local boolean _IsExtern = (CONFIG.Settings.OperationMode == "Extern");