pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28288-KettleDrum.ps) >>/Users/jc/w/tmp/Tune-28288-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/KettleDrum.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-28288-10661_.abc 50 ABC music file with the extracted tune(s)
Tune-28288-10661_.ps 6 PostScript
Tune-28288-10661_.txt 50 Plain-text file with the extracted tune(s)
Tune-28288-KettleDrum.abc 240 ABC music file with the extracted tune(s)
Tune-28288-KettleDrum.ps 32622 PostScript
Tune-28288-KettleDrum.txt 240 Plain-text file with the extracted tune(s)
Tune-28288-get.log 8156 Log file, useful mostly for debugging
These files should be available for 24 hours.