ilogic rule error in assembly

[mario170979]

Hello,

i have a ilogic rule which cleans up our parts. Works fine when a part is the active document. To start the rule i set up a event trigger "Parts" - "Before Save Document" .. 

In one case it runs in problems: When i work in a assembly and use the "Save and Replace" Command than Inventor save the file and the rule get triggered. 

I think the error comes from first lines which not working in a assembly: 

Dim oDoc As PartDocument = ThisDoc.Document 'Define oDoc as Partdocumenttype to get the functions for this 

If oDoc.SubType = "{9C464203-9BAE-11D3-8BAD-0060B0CE6BB4}" Then 'check that the Document is a Sheetmetal Part

Dim oDef As SheetMetalComponentDefinition = oDoc.ComponentDefinition 'Define oDef as SheetMetal..Defination to get the data 
Dim oBodies As SurfaceBodies = oDef.SurfaceBodies 
If oBodies.Count > 1 Then 

So i know one solution: i check in the rule that it is a Part Document at first and if not than the rule should stop. 

But i would prefer a way that the rule runs. For this i dont know how i can modificate the code that it works. 

[bradeneuropeArthur · Accepted solution]

Use a

Try

Catch exception

End try