pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12778-YouBetReel.ps) >>/Users/jc/w/tmp/Tune-12778-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/YouBetReel.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-12778-YouBetReel.abc 476 ABC music file with the extracted tune(s)
Tune-12778-YouBetReel.ps 36260 PostScript
Tune-12778-YouBetReel.txt 476 Plain-text file with the extracted tune(s)
Tune-12778-get.log 8033 Log file, useful mostly for debugging
These files should be available for 24 hours.