pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92965-BeggarBoy.ps) >>/Users/jc/w/tmp/Tune-92965-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/BeggarBoy.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-92965-BeggarBoy.abc 339 ABC music file with the extracted tune(s)
Tune-92965-BeggarBoy.ps 33521 PostScript
Tune-92965-BeggarBoy.txt 339 Plain-text file with the extracted tune(s)
Tune-92965-all.abc 158 ABC music file with the extracted tune(s)
Tune-92965-all.txt 158 Plain-text file with the extracted tune(s)
Tune-92965-get.log 7528 Log file, useful mostly for debugging
These files should be available for 24 hours.