pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2942-ChirpingOfTheLarkThe_PLFD1651_015.ps) >>/Users/jc/w/tmp/Tune-2942-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/ChirpingOfTheLarkThe_PLFD1651_015.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_29425.log 646821 Log file, useful mostly for debugging
Tune-2942-ChirpingOfTheLarkThe_PLFD1651_015.abc 467 ABC music file with the extracted tune(s)
Tune-2942-ChirpingOfTheLarkThe_PLFD1651_015.ps 32293 PostScript
Tune-2942-ChirpingOfTheLarkThe_PLFD1651_015.txt 467 Plain-text file with the extracted tune(s)
Tune-2942-get.log 5691 Log file, useful mostly for debugging
These files should be available for 24 hours.