Thread: Custom Column: Template Error Python
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Old 06-27-2026, 09:44 AM   #2
thiago.eec
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I'm also getting this error for my 'Genre' column (built from others), which uses a Python template. It fixes itself if I folow this steps: open the Metadata Editor > click 'Next' record > close the Metadata Editor.

The error only happens in the Details panel. The book list always shows the calculated value.

This started a couple of versions ago, but I forgot to metion. I'm not sure if it was a beta version or 9.9.
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