Beam_placing problem

Hi guys, I’m trying to place beam automatically using dynamo and python script. But when I run the program. It says: symbol is not active . And then I come back to revit and place some beam and then delete it to make sure that my family is 100% active. But when I turn back to dynamo and run the program, this error still happens. Could you guys help me with this problem, thanks guys

Can you post an image of your script?

I’m sorry, I did a silly mistake. So problem solved. Thanks for concerning.

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