Set Formula not works

Dear Experts,
I was trying to modify formula inside family. After running script below no any change seems at family inside project. However, when editing family inside Revit and checking parameter formula realized that script changed formula there.
What can be reason of not changing formula inside project file?

hello, what if you send a number?


Not helped

Sorry, I really believed it, I’m a little bad on the family side (there are plenty of nodes that I don’t have), you checked the object type on the initial value


Orchid nodes only work in family documents.

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