question

Aaron Powell avatar image
Aaron Powell asked

Arnold API errors out on import with Python 3.9

When loading the Arnold Python API in 3.9, the import command errors out the first time saying it "cannot find ai.dll". Trying to import it again after that works as expected, though.

try:
    import arnold # this will return the error
except:
    print("Something went wrong, trying again...")
    import arnold # this will succeed

# I can now call API functions as expected
arnold.AiBegin()

This seems to only be an issue on 3.9 - earlier versions work as expected. Has anyone else seen this? I tested on Arnold 6.0.4.0 and 6.2.0.0 with the same result.

arnoldpythonapisdk
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Stephen Blair avatar image
Stephen Blair answered

If you set PATH yourself to include the Arnold bin folder, then it will work the first time.

It seems that something changed in Python, and trying to load Arnold without a full path is failing with Python 3.9

Thanks for reporting, I'll log a ticket.

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