How make a concecutive numbering of family instances

I’m about to make an automation of classification on family instances, the singlelevelID in CCS coding. I would like to combine the Classcode with the consectutive numbering, so a wall instance would be #AD1, #AD2 etc.

I’m aware of the difference between type parameters and instance parameters but i dont know how to solve it in dynamo.

n

Hi, you should reload your graph because it is not readable. You will find useful information about type and instance parameters on this page:
http://dynamoprimer.com/en/08_Dynamo-for-Revit/8-3_Editing.html