pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3444-I_Want_A_Girl.ps) >>/Users/jc/w/tmp/Tune-3444-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Square/I_Want_A_Girl.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_34446.log 148610 Log file, useful mostly for debugging
Tune-3444-I_Want_A_Girl.abc 424 ABC music file with the extracted tune(s)
Tune-3444-I_Want_A_Girl.ps 33155 PostScript
Tune-3444-I_Want_A_Girl.txt 424 Plain-text file with the extracted tune(s)
Tune-3444-get.log 4454 Log file, useful mostly for debugging
Tune-34441-get.log 5087 Log file, useful mostly for debugging
Tune-34449-get.log 3993 Log file, useful mostly for debugging
These files should be available for 24 hours.