Custom Node Symbols Error Message

I got a property error message of using “# % * ? \ :” while I am creating a custom node that the name only is only using alphabet. Does anyone have idea what the problem was?

not without seeing the name of your custom node :wink: - spaces perhaps?

It seems like a version problem. I went back to open the same Dynamo file from Revit R19. It didn’t give me the error message from Revit R20. I agree it was probably the space. I assume R20 Dynamo doesn’t allow " " in between the names.