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Is it not possible to run an external python39.dll ? It seems the error is FME Supports Python 2.7 and Python 3.6 to 3.8 ? However when choosing the interpreter I assumed that it would be using the "External evnironment"?

Hi @Sigbjørn Herstad​ 

Unfortunately, FME 2021.x only supports Python 3.8.

If you want to use Python 39, you will need FME 2022.0 (currently in betas) installed and then set up Custom Python Interpreter to your Python 39 directory as suggested in this article


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