pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-23337-BellesOfOmahaReel.ps) >>/Users/jc/w/tmp/Tune-23337-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ryan-cole/Tunes/BellesOfOmahaReel.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_23337.log 417805 Log file, useful mostly for debugging
Tune-23337-BellesOfOmahaReel.abc 509 ABC music file with the extracted tune(s)
Tune-23337-BellesOfOmahaReel.ps 36014 PostScript
Tune-23337-BellesOfOmahaReel.txt 509 Plain-text file with the extracted tune(s)
Tune-23337-get.log 4691 Log file, useful mostly for debugging
These files should be available for 24 hours.