some mid importing will cause memory overflow >4G crash

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https://file.io/2fVZ0Po5sv4h

Your MIDI file contains nearly 9400 measures, single notes that last over 1300 measures each, multiple zero-length notes, and many overlapping notes which do not make sense for monophonic vocal tracks.

While it would certainly be ideal if the software had checks for problematic MIDI files, the real issue here is the file you’re attempting to use.