pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4005-Tom_Jones.ps) >>/Users/jc/w/tmp/Tune-4005-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/GM/Tom_Jones.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_40051.log 441609 Log file, useful mostly for debugging
Coll_40052.log 445809 Log file, useful mostly for debugging
Coll_40059.log 437409 Log file, useful mostly for debugging
Form_40059.log 1027 Log file, useful mostly for debugging
Tune-4005-Tom_Jones.abc 776 ABC music file with the extracted tune(s)
Tune-4005-Tom_Jones.ps 34375 PostScript
Tune-4005-Tom_Jones.txt 776 Plain-text file with the extracted tune(s)
Tune-4005-get.log 4306 Log file, useful mostly for debugging
These files should be available for 24 hours.