Thanks for the update, Art.

Given that we now know that there are other files with the same filename (but different file extension), it may be an audio file that produces the error. You might try renaming the WAV or the MP3 file to something else and testing to see if you get the same error.

Tip: If a file with the same filename but a .WAV extension is in the same folder as the .MGU file, BiaB will try to load that WAV file.

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