pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8152-TwoPennyPostmansJig.ps) >>/Users/jc/w/tmp/Tune-8152-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/TwoPennyPostmansJig.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_81524.log 367225 Log file, useful mostly for debugging
Tune-8152-TwoPennyPostmansJig.abc 334 ABC music file with the extracted tune(s)
Tune-8152-TwoPennyPostmansJig.ps 33376 PostScript
Tune-8152-TwoPennyPostmansJig.txt 334 Plain-text file with the extracted tune(s)
Tune-8152-get.log 4737 Log file, useful mostly for debugging
Tune-81527-get.log 4172 Log file, useful mostly for debugging
These files should be available for 24 hours.