pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-33211-SiegeOfLimerick.ps) >>/Users/jc/w/tmp/Tune-33211-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/SiegeOfLimerick.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_33211.log 444410 Log file, useful mostly for debugging
Tune-33211-SiegeOfLimerick.abc 460 ABC music file with the extracted tune(s)
Tune-33211-SiegeOfLimerick.ps 34043 PostScript
Tune-33211-SiegeOfLimerick.txt 460 Plain-text file with the extracted tune(s)
Tune-33211-get.log 4615 Log file, useful mostly for debugging
These files should be available for 24 hours.