pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3656-CornishSquireThe_PLFD1696_352.ps) >>/Users/jc/w/tmp/Tune-3656-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/CornishSquireThe_PLFD1696_352.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_36564.log 458409 Log file, useful mostly for debugging
Coll_36566.log 458409 Log file, useful mostly for debugging
Coll_36569.log 942020 Log file, useful mostly for debugging
Tune-3656-CornishSquireThe_PLFD1696_352.abc 420 ABC music file with the extracted tune(s)
Tune-3656-CornishSquireThe_PLFD1696_352.ps 33880 PostScript
Tune-3656-CornishSquireThe_PLFD1696_352.txt 420 Plain-text file with the extracted tune(s)
Tune-3656-get.log 4946 Log file, useful mostly for debugging
Tune-36561-get.log 3612 Log file, useful mostly for debugging
Tune-36568-get.log 3112 Log file, useful mostly for debugging
Tune-36569-get.log 2888 Log file, useful mostly for debugging
These files should be available for 24 hours.