pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34006-HOnTheWabashJig.ps) >>/Users/jc/w/tmp/Tune-34006-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/HOnTheWabashJig.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_34006.log 313835 Log file, useful mostly for debugging
Tune-34006-HOnTheWabashJig.abc 586 ABC music file with the extracted tune(s)
Tune-34006-HOnTheWabashJig.ps 36891 PostScript
Tune-34006-HOnTheWabashJig.txt 586 Plain-text file with the extracted tune(s)
Tune-34006-get.log 4653 Log file, useful mostly for debugging
These files should be available for 24 hours.