Error exit status 256; here are some files to check:
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file
size
description
Tune-40765-endo.abc
100
ABC music file with the extracted tune(s)
Tune-40765-endo.txt
100
Plain-text file with the extracted tune(s)
Tune-40765-get.log
6200
Log file, useful mostly for debugging
These files should be available for 24 hours.