pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-74400-JohnKelly.ps) >>/Users/jc/w/tmp/Tune-74400-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/BruceShawyer/jigs/JohnKelly.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_74400.log 136757 Log file, useful mostly for debugging
Tune-74400-JohnKelly.abc 324 ABC music file with the extracted tune(s)
Tune-74400-JohnKelly.ps 35749 PostScript
Tune-74400-JohnKelly.txt 324 Plain-text file with the extracted tune(s)
Tune-74400-get.log 4308 Log file, useful mostly for debugging
These files should be available for 24 hours.