pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2924-037_Steam_Boat.ps) >>/Users/jc/w/tmp/Tune-2924-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JeanWhite/100_Popular_HRJCD/037_Steam_Boat.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_29242.log 459810 Log file, useful mostly for debugging
Coll_29247.log 469608 Log file, useful mostly for debugging
Tune-2924-037_Steam_Boat.abc 691 ABC music file with the extracted tune(s)
Tune-2924-037_Steam_Boat.ps 35314 PostScript
Tune-2924-037_Steam_Boat.txt 691 Plain-text file with the extracted tune(s)
Tune-2924-get.log 4640 Log file, useful mostly for debugging
Tune-29240-get.log 4677 Log file, useful mostly for debugging
Tune-29243-get.log 4487 Log file, useful mostly for debugging
These files should be available for 24 hours.