index: Allow FileNotFoundError to be handled at the top level #1646
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Description of proposed changes
The removed error handling is flawed: it assumes that FileNotFoundError can only come from a missing input file (--sequences). The reality is that FileNotFoundError can also come from a missing output directory (--output). The top-level exception handler parses the filepath from the error directly, which is accurate.
Related issue(s)
Fixes #1644
Checklist
Check if you need to add teststested locally that this works. I don't think adding a test is necessary in this case