Assembly instance property API reference Inventor 2022

[bradeneuropeArthur]

Hi,

How to change edit the "Assembly Instance Properties" of child files via the API?

Regards,

[bradeneuropeArthur · Accepted solution]

Found:

Public Sub main()

Dim a As Inventor.Application
Set a = ThisApplication

Dim b As AssemblyDocument
Set b = a.ActiveDocument

Dim c As AssemblyComponentDefinition
Set c = b.ComponentDefinition

Dim occ As ComponentOccurrence
Set occ = c.Occurrences.Item(1)

MsgBox occ.OccurrencePropertySets.Item(1).Item(1).Name

End Sub

[nmunro]

Your code will work if the user has already added an Instance property to the first occurrence in the assembly. In a more general application, you should add another step to ensure the occurrence has a valid Instance property set to work with. The following code works on a newly created assembly where no occurrences have had Instance Properties added via the Inventor UI.

Public Sub main()

Dim a As Inventor.Application
Set a = ThisApplication

Dim b As AssemblyDocument
Set b = a.ActiveDocument

Dim c As AssemblyComponentDefinition
Set c = b.ComponentDefinition

Dim occ As ComponentOccurrence
Set occ = c.Occurrences.Item(1)

' ensure the default occurrence property set is enabled
' this property set has the same internal name (GUID)
'   as the custom property set for a document
occ.OccurrencePropertySetsEnabled = True

' get the property set and add a property
Dim instancePropSet As PropertySet
Set instancePropSet = occ.OccurrencePropertySets(1)
Dim instanceProp As Property
Set instanceProp = instancePropSet.Add("World", "HelloProperty")

'show instance prop data
MsgBox instanceProp.Name & ": " & instanceProp.Value

End Sub

[CattabianiI]

Just to avoid headaches if you get your hands dirty on the subject, at the moment there is this known bug that should be fixed in the next release:
INVGEN-50622: OccurrencePropertySetsEnabled = True throws an exception if the assembly file is readonly.
beta program link

[bradeneuropeArthur]

Have you already reported it to the development team?

[CattabianiI]

I reported it in the beta program forum (that's the small link above) and they gave me that issue ID.