pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4913-30754_Missouri_Hornpipe.ps) >>/Users/jc/w/tmp/Tune-4913-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30754_Missouri_Hornpipe.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_4913.log 452811 Log file, useful mostly for debugging
Coll_49136.log 452810 Log file, useful mostly for debugging
Form_49135.log 964 Log file, useful mostly for debugging
Tune-4913-30754_Missouri_Hornpipe.abc 731 ABC music file with the extracted tune(s)
Tune-4913-30754_Missouri_Hornpipe.ps 36001 PostScript
Tune-4913-30754_Missouri_Hornpipe.txt 731 Plain-text file with the extracted tune(s)
Tune-4913-get.log 5041 Log file, useful mostly for debugging
Tune-49130-get.log 1400 Log file, useful mostly for debugging
Tune-49134-get.log 1400 Log file, useful mostly for debugging
Tune-49136-get.log 15924 Log file, useful mostly for debugging
Tune-49137-get.log 4418 Log file, useful mostly for debugging
Tune-49138-get.log 1400 Log file, useful mostly for debugging
These files should be available for 24 hours.