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Hi, This is due to a bug in MetPy that crops up on Python 3.8. Unfortunately, the fix for it was slightly involved: https://github.com/Unidata/MetPy/pull/1233 This should be out in the next release, which we're working to finish up right now. The easiest work around would be to use Python 3.7 for now. > Hello, > > I get this error on some of your python scripts (see attached). > > How can I fix this? > I get the same error when running the Differential Temperature Advection > script. > > Many thanks Ticket Details =================== Ticket ID: SEA-541690 Department: Support Python Priority: Low Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.