midicmd="abc2midi /Users/jc/w/tmp/Tune-1398-training_abc_XX.abc -v -o /Users/jc/w/tmp/Tune-1398-training_abc_XX.midi >>/Users/jc/w/tmp/Tune-1398-get.log 2>&1" returned status 256.

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 ]
filesizedescription
Coll_13988.log 147042 Log file, useful mostly for debugging
Tune-1398-get.log 4092 Log file, useful mostly for debugging
Tune-1398-training_abc_XX.abc 489 ABC music file with the extracted tune(s)
Tune-1398-training_abc_XX.malt 3100 Musical Instrument Digital Interface, alternate name for midi format
Tune-1398-training_abc_XX.mid 3100 Musical Instrument Digital interface, shortened name for midi format
Tune-1398-training_abc_XX.midi 3100 Musical Instrument Digital Interface, electronic version of the tune(s)
Tune-1398-training_abc_XX.txt 489 Plain-text file with the extracted tune(s)
Tune-13981-get.log 2917 Log file, useful mostly for debugging
Tune-13989-get.log 3077 Log file, useful mostly for debugging
These files should be available for 24 hours.