pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-47509-ThreeMeet.ps) >>/Users/jc/w/tmp/Tune-47509-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/ThreeMeet.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_47509.log 469611 Log file, useful mostly for debugging
Tune-47509-ThreeMeet.abc 309 ABC music file with the extracted tune(s)
Tune-47509-ThreeMeet.ps 33715 PostScript
Tune-47509-ThreeMeet.txt 309 Plain-text file with the extracted tune(s)
Tune-47509-get.log 4357 Log file, useful mostly for debugging
These files should be available for 24 hours.