midicmd="abc2midi /Users/jc/w/tmp/Tune-469-hnr3.abc -v -o /Users/jc/w/tmp/Tune-469-hnr3.midi >>/Users/jc/w/tmp/Tune-469-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
Form_4690.log 869 Log file, useful mostly for debugging
Tune-469-get.log 11655 Log file, useful mostly for debugging
Tune-469-hnr3.abc 866 ABC music file with the extracted tune(s)
Tune-469-hnr3.malt 4096 Musical Instrument Digital Interface, alternate name for midi format
Tune-469-hnr3.mid 4096 Musical Instrument Digital interface, shortened name for midi format
Tune-469-hnr3.midi 4096 Musical Instrument Digital Interface, electronic version of the tune(s)
Tune-469-hnr3.txt 866 Plain-text file with the extracted tune(s)
Tune-4691-get.log 34219 Log file, useful mostly for debugging
Tune-46914-Est.abc 0 ABC music file with the extracted tune(s)
Tune-46914-Est.txt 0 Plain-text file with the extracted tune(s)
Tune-46914-get.log 3037 Log file, useful mostly for debugging
Tune-46948-get.log 60940 Log file, useful mostly for debugging
Tune-46948-scotland-001.svg 41714 Scalable Vector Graphics format
Tune-46948-scotland.abc 664 ABC music file with the extracted tune(s)
Tune-46948-scotland.txt 664 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.