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    <title>topic Overriding existing rule to parts in assy in Inventor Programming - iLogic, Macros, AddIns &amp; Apprentice</title>
    <link>https://forums.autodesk.com/t5/inventor-programming-ilogic/overriding-existing-rule-to-parts-in-assy/m-p/11757017#M149085</link>
    <description>&lt;PRE&gt;&lt;SPAN&gt;I have spliced together some ilogic code to override an existing internal rule for all parts in an assembly. The rule &lt;BR /&gt;it is overriding works fine. When I run this rule in an assembly it seems to work for the first part then I get an error. &lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;"Object reference not set to an instance of an object."&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;"System.NullReferenceException: Object reference not set to an instance of an object.&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at ThisRule.Addbomdescription()&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at ThisRule.Main()&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at Autodesk.iLogic.Exec.AppDomExec.ExecRuleInAssembly(Assembly assem)&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at iLogic.RuleEvalContainer.ExecRuleEval(String execRule)"&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;BR /&gt;The parts are derived from a main sketch part that is not in the assembly. could this be hanging it up?&lt;BR /&gt;I have also tried running a bit of code to just run the external rule with no luck.&lt;BR /&gt;Here is the "code" any ideas I would greatly appreciate it.&lt;BR /&gt;&lt;BR /&gt;Public&lt;/SPAN&gt; &lt;SPAN&gt;Sub&lt;/SPAN&gt; &lt;SPAN&gt;Addbomdescription&lt;/SPAN&gt;()
	    &lt;SPAN&gt;' Get the open top-level assembly.&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;asmDoc&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;AssemblyDocument&lt;/SPAN&gt; = &lt;SPAN&gt;ThisApplication&lt;/SPAN&gt;.&lt;SPAN&gt;ActiveDocument&lt;/SPAN&gt;
    &lt;SPAN&gt;' Get a list of all documents referenced by this assembly.&lt;/SPAN&gt;
    &lt;SPAN&gt;' This property will return everything at all levels.&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;refDocs&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;DocumentsEnumerator&lt;/SPAN&gt; = &lt;SPAN&gt;asmDoc&lt;/SPAN&gt;.&lt;SPAN&gt;AllReferencedDocuments&lt;/SPAN&gt;
	
&lt;SPAN&gt;    Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRuleName&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;String&lt;/SPAN&gt; = &lt;SPAN&gt;"BOM DESCRIPTION"&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oTxtFileName&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;String&lt;/SPAN&gt; = &lt;SPAN&gt;"C:\Work\CAD Stds\Inventor\Crush iLogic\BOM RULES\BOM DESCRIPTION FEET.txt"&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRuleText&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;String&lt;/SPAN&gt; = &lt;SPAN&gt;IO&lt;/SPAN&gt;.&lt;SPAN&gt;File&lt;/SPAN&gt;.&lt;SPAN&gt;ReadAllText&lt;/SPAN&gt;(&lt;SPAN&gt;oTxtFileName&lt;/SPAN&gt;)
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oDoc&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;Document&lt;/SPAN&gt; = &lt;SPAN&gt;ThisApplication&lt;/SPAN&gt;.&lt;SPAN&gt;ActiveEditDocument&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRuleExists&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;Boolean&lt;/SPAN&gt; = &lt;SPAN&gt;False&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt; = &lt;SPAN&gt;iLogicVb&lt;/SPAN&gt;.&lt;SPAN&gt;Automation&lt;/SPAN&gt;
    &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;RulesEnabled&lt;/SPAN&gt; = &lt;SPAN&gt;True&lt;/SPAN&gt;
    &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;RulesOnEventsEnabled&lt;/SPAN&gt; = &lt;SPAN&gt;True&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRule&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;iLogicRule&lt;/SPAN&gt;
    &lt;SPAN&gt;' Iterate through the documents.&lt;/SPAN&gt;
    &lt;SPAN&gt;For&lt;/SPAN&gt; &lt;SPAN&gt;Each&lt;/SPAN&gt; &lt;SPAN&gt;oDoc&lt;/SPAN&gt; &lt;SPAN&gt;In&lt;/SPAN&gt; &lt;SPAN&gt;refDocs&lt;/SPAN&gt;
        &lt;SPAN&gt;' Look for part documents.&lt;/SPAN&gt;
        &lt;SPAN&gt;If&lt;/SPAN&gt; &lt;SPAN&gt;TypeOf&lt;/SPAN&gt; (&lt;SPAN&gt;oDoc&lt;/SPAN&gt;) &lt;SPAN&gt;Is&lt;/SPAN&gt; &lt;SPAN&gt;PartDocument&lt;/SPAN&gt; &lt;SPAN&gt;Then&lt;/SPAN&gt;
	&lt;SPAN&gt;'ADD BOM DESCRIPTION INTERNAL RULE&lt;/SPAN&gt;
			&lt;SPAN&gt;Try&lt;/SPAN&gt;
			&lt;SPAN&gt;oRule&lt;/SPAN&gt; = &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;GetRule&lt;/SPAN&gt;(&lt;SPAN&gt;oDoc&lt;/SPAN&gt;, &lt;SPAN&gt;oRuleName&lt;/SPAN&gt;)
			&lt;SPAN&gt;Catch&lt;/SPAN&gt;
			&lt;SPAN&gt;oRule&lt;/SPAN&gt; = &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;AddRule&lt;/SPAN&gt;(&lt;SPAN&gt;oDoc&lt;/SPAN&gt;, &lt;SPAN&gt;oRuleName&lt;/SPAN&gt;, &lt;SPAN&gt;""&lt;/SPAN&gt;)
			&lt;SPAN&gt;End&lt;/SPAN&gt; &lt;SPAN&gt;Try&lt;/SPAN&gt;
			&lt;SPAN&gt;oRule&lt;/SPAN&gt;.&lt;SPAN&gt;Text&lt;/SPAN&gt; = &lt;SPAN&gt;oRuleText&lt;/SPAN&gt;
			&lt;SPAN&gt;iLogicVb&lt;/SPAN&gt;.&lt;SPAN&gt;DocumentUpdate&lt;/SPAN&gt;
       &lt;SPAN&gt;End&lt;/SPAN&gt; &lt;SPAN&gt;If&lt;/SPAN&gt;
&lt;SPAN&gt;Next&lt;/SPAN&gt;

&lt;SPAN&gt;End&lt;/SPAN&gt; &lt;SPAN&gt;Sub&lt;/SPAN&gt;&lt;/PRE&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Wed, 15 Feb 2023 16:21:19 GMT</pubDate>
    <dc:creator>eric.smyth</dc:creator>
    <dc:date>2023-02-15T16:21:19Z</dc:date>
    <item>
      <title>Overriding existing rule to parts in assy</title>
      <link>https://forums.autodesk.com/t5/inventor-programming-ilogic/overriding-existing-rule-to-parts-in-assy/m-p/11757017#M149085</link>
      <description>&lt;PRE&gt;&lt;SPAN&gt;I have spliced together some ilogic code to override an existing internal rule for all parts in an assembly. The rule &lt;BR /&gt;it is overriding works fine. When I run this rule in an assembly it seems to work for the first part then I get an error. &lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;"Object reference not set to an instance of an object."&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;"System.NullReferenceException: Object reference not set to an instance of an object.&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at ThisRule.Addbomdescription()&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at ThisRule.Main()&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at Autodesk.iLogic.Exec.AppDomExec.ExecRuleInAssembly(Assembly assem)&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT color="#FF6600"&gt;&lt;EM&gt;at iLogic.RuleEvalContainer.ExecRuleEval(String execRule)"&lt;/EM&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;BR /&gt;The parts are derived from a main sketch part that is not in the assembly. could this be hanging it up?&lt;BR /&gt;I have also tried running a bit of code to just run the external rule with no luck.&lt;BR /&gt;Here is the "code" any ideas I would greatly appreciate it.&lt;BR /&gt;&lt;BR /&gt;Public&lt;/SPAN&gt; &lt;SPAN&gt;Sub&lt;/SPAN&gt; &lt;SPAN&gt;Addbomdescription&lt;/SPAN&gt;()
	    &lt;SPAN&gt;' Get the open top-level assembly.&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;asmDoc&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;AssemblyDocument&lt;/SPAN&gt; = &lt;SPAN&gt;ThisApplication&lt;/SPAN&gt;.&lt;SPAN&gt;ActiveDocument&lt;/SPAN&gt;
    &lt;SPAN&gt;' Get a list of all documents referenced by this assembly.&lt;/SPAN&gt;
    &lt;SPAN&gt;' This property will return everything at all levels.&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;refDocs&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;DocumentsEnumerator&lt;/SPAN&gt; = &lt;SPAN&gt;asmDoc&lt;/SPAN&gt;.&lt;SPAN&gt;AllReferencedDocuments&lt;/SPAN&gt;
	
&lt;SPAN&gt;    Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRuleName&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;String&lt;/SPAN&gt; = &lt;SPAN&gt;"BOM DESCRIPTION"&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oTxtFileName&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;String&lt;/SPAN&gt; = &lt;SPAN&gt;"C:\Work\CAD Stds\Inventor\Crush iLogic\BOM RULES\BOM DESCRIPTION FEET.txt"&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRuleText&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;String&lt;/SPAN&gt; = &lt;SPAN&gt;IO&lt;/SPAN&gt;.&lt;SPAN&gt;File&lt;/SPAN&gt;.&lt;SPAN&gt;ReadAllText&lt;/SPAN&gt;(&lt;SPAN&gt;oTxtFileName&lt;/SPAN&gt;)
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oDoc&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;Document&lt;/SPAN&gt; = &lt;SPAN&gt;ThisApplication&lt;/SPAN&gt;.&lt;SPAN&gt;ActiveEditDocument&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRuleExists&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;Boolean&lt;/SPAN&gt; = &lt;SPAN&gt;False&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt; = &lt;SPAN&gt;iLogicVb&lt;/SPAN&gt;.&lt;SPAN&gt;Automation&lt;/SPAN&gt;
    &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;RulesEnabled&lt;/SPAN&gt; = &lt;SPAN&gt;True&lt;/SPAN&gt;
    &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;RulesOnEventsEnabled&lt;/SPAN&gt; = &lt;SPAN&gt;True&lt;/SPAN&gt;
    &lt;SPAN&gt;Dim&lt;/SPAN&gt; &lt;SPAN&gt;oRule&lt;/SPAN&gt; &lt;SPAN&gt;As&lt;/SPAN&gt; &lt;SPAN&gt;iLogicRule&lt;/SPAN&gt;
    &lt;SPAN&gt;' Iterate through the documents.&lt;/SPAN&gt;
    &lt;SPAN&gt;For&lt;/SPAN&gt; &lt;SPAN&gt;Each&lt;/SPAN&gt; &lt;SPAN&gt;oDoc&lt;/SPAN&gt; &lt;SPAN&gt;In&lt;/SPAN&gt; &lt;SPAN&gt;refDocs&lt;/SPAN&gt;
        &lt;SPAN&gt;' Look for part documents.&lt;/SPAN&gt;
        &lt;SPAN&gt;If&lt;/SPAN&gt; &lt;SPAN&gt;TypeOf&lt;/SPAN&gt; (&lt;SPAN&gt;oDoc&lt;/SPAN&gt;) &lt;SPAN&gt;Is&lt;/SPAN&gt; &lt;SPAN&gt;PartDocument&lt;/SPAN&gt; &lt;SPAN&gt;Then&lt;/SPAN&gt;
	&lt;SPAN&gt;'ADD BOM DESCRIPTION INTERNAL RULE&lt;/SPAN&gt;
			&lt;SPAN&gt;Try&lt;/SPAN&gt;
			&lt;SPAN&gt;oRule&lt;/SPAN&gt; = &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;GetRule&lt;/SPAN&gt;(&lt;SPAN&gt;oDoc&lt;/SPAN&gt;, &lt;SPAN&gt;oRuleName&lt;/SPAN&gt;)
			&lt;SPAN&gt;Catch&lt;/SPAN&gt;
			&lt;SPAN&gt;oRule&lt;/SPAN&gt; = &lt;SPAN&gt;iLogicAuto&lt;/SPAN&gt;.&lt;SPAN&gt;AddRule&lt;/SPAN&gt;(&lt;SPAN&gt;oDoc&lt;/SPAN&gt;, &lt;SPAN&gt;oRuleName&lt;/SPAN&gt;, &lt;SPAN&gt;""&lt;/SPAN&gt;)
			&lt;SPAN&gt;End&lt;/SPAN&gt; &lt;SPAN&gt;Try&lt;/SPAN&gt;
			&lt;SPAN&gt;oRule&lt;/SPAN&gt;.&lt;SPAN&gt;Text&lt;/SPAN&gt; = &lt;SPAN&gt;oRuleText&lt;/SPAN&gt;
			&lt;SPAN&gt;iLogicVb&lt;/SPAN&gt;.&lt;SPAN&gt;DocumentUpdate&lt;/SPAN&gt;
       &lt;SPAN&gt;End&lt;/SPAN&gt; &lt;SPAN&gt;If&lt;/SPAN&gt;
&lt;SPAN&gt;Next&lt;/SPAN&gt;

&lt;SPAN&gt;End&lt;/SPAN&gt; &lt;SPAN&gt;Sub&lt;/SPAN&gt;&lt;/PRE&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Wed, 15 Feb 2023 16:21:19 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/inventor-programming-ilogic/overriding-existing-rule-to-parts-in-assy/m-p/11757017#M149085</guid>
      <dc:creator>eric.smyth</dc:creator>
      <dc:date>2023-02-15T16:21:19Z</dc:date>
    </item>
    <item>
      <title>Re: Overriding existing rule to parts in assy</title>
      <link>https://forums.autodesk.com/t5/inventor-programming-ilogic/overriding-existing-rule-to-parts-in-assy/m-p/11757078#M149087</link>
      <description>&lt;P&gt;Hi&amp;nbsp;&lt;a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/12707125"&gt;@eric.smyth&lt;/a&gt;.&amp;nbsp; I see a couple things that could be improved upon to possibly avoid some potential problems.&amp;nbsp; First of all, you should either declare your 'oRule' variable, and your 'oRuleExists' variable down within the loop, or re-set their values to False &amp;amp; Nothing at the start of the loop, to make sure a previous value does not carry over into the next loop.&amp;nbsp; Next, the GetRule method will not throw an error if the rule is not found, which may break the functionality of your Try...Catch block.&amp;nbsp; You need to check if oRule Is Nothing after using that method to make sure.&amp;nbsp; Also, you may need to save your changes to those referenced documents after changing the text of their internal rules, or adding an internal rule.&amp;nbsp; But you may be doing that manually, by saving the main assembly afterwards.&amp;nbsp; Maybe just an AssemblyDocument.Update2() when done.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Wed, 15 Feb 2023 16:39:35 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/inventor-programming-ilogic/overriding-existing-rule-to-parts-in-assy/m-p/11757078#M149087</guid>
      <dc:creator>WCrihfield</dc:creator>
      <dc:date>2023-02-15T16:39:35Z</dc:date>
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