ERROR 1: "Class not registered" / OSError when calling comtypes.client.GetActiveObject() CAUSE: 64-bit Python is being used. ETABS COM objects are 32-bit only. FIX ...
# ETABS 2021 OAPI requires 32-bit Python 3.7–3.10. # comtypes and the CSI COM objects are 32-bit only on Windows.
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