pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5569-CR20.ps) >>/Users/jc/w/tmp/Tune-5569-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CR20.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_55691.log 281521 Log file, useful mostly for debugging
Tune-5569-CR20.abc 2438 ABC music file with the extracted tune(s)
Tune-5569-CR20.ps 47419 PostScript
Tune-5569-CR20.txt 2438 Plain-text file with the extracted tune(s)
Tune-5569-get.log 4369 Log file, useful mostly for debugging
Tune-55690-get.log 4662 Log file, useful mostly for debugging
Tune-55694-get.log 5378 Log file, useful mostly for debugging
Tune-55695-get.log 4643 Log file, useful mostly for debugging
Tune-55699-get.log 4882 Log file, useful mostly for debugging
These files should be available for 24 hours.