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With how it was written, I definitely had difficulty in understanding why you would go through the trouble of making the whole param array only to check it against itself and apparently establish a type based off of that.

 

The confusing part is why you didn't just write a simple case/if structure to check the existence of parameters in a part and make a type based off of that.

 

ie;

 

Sub Main()
    If ParamsExist(oDoc, "G_L", "A_F") = True Then
          Type = "Plastic"
   Else if ParamsExist(oDoc, "b", "t", "k") = True Then
           Type = some custom type
   End if 
End SUb

Function ParamsExist(oDoc, ByVal ParamArray paramstocheck As String()) As Boolean
       For each oParam in paramstocheck
           Try
                 oDoc.Parameters(oParam)
            Catch
                 'Accessing prop failed; it doesn't exist
                 Return False
                 Exit Sub
            End Try
       Next 
       Return True
End Function

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Justin K
Inventor 2018.2.3, Build 227 | Excel 2013+ VBA
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