I saw that this topic pasted allready a lot of times, but i encounter problem with revit 2017 to make it work:
I am working with the custom node from Konrad Sobon. But to see where the error is, i put his python scipt directly in the dynamo file:
Ands i get this error:
IronPythonEvaluator.EvaluateIronPythonScript operation failed.
Traceback (most recent call last):
File “”, line 97, in
AttributeError: ‘NoneType’ object has no attribute ‘Count’
does anybody have an idea?