Hi,
I download an API for revit and when I want to use it on model, which I have created before I download the app manager it doesn’t work but on a new models which I started to create now it works. Don’t you know why?
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Hey @Tomas_Pokorny ,
Welcome to the community! Feel free to Introduce yourself 
to the community if you want to! 
I’m sorry but I didn’t understand your question. If your question is related to the Revit API, I recommend checking the Revit API forum.
Could you please provide us with as many details as possible, along with screenshots and files, to help us understand your problem better?
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