pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28329-BlueVelvetClog.ps) >>/Users/jc/w/tmp/Tune-28329-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/BlueVelvetClog.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_28329.log 295570 Log file, useful mostly for debugging
Tune-28329-BlueVelvetClog.abc 543 ABC music file with the extracted tune(s)
Tune-28329-BlueVelvetClog.ps 37811 PostScript
Tune-28329-BlueVelvetClog.txt 543 Plain-text file with the extracted tune(s)
Tune-28329-get.log 4693 Log file, useful mostly for debugging
These files should be available for 24 hours.