pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2522-4323.ps) >>/Users/jc/w/tmp/Tune-2522-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/4323=Orange_and_Blue-abc2.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_25223.log 1201795 Log file, useful mostly for debugging
Coll_25229.log 542925 Log file, useful mostly for debugging
Tune-2522-4323.abc 1344 ABC music file with the extracted tune(s)
Tune-2522-4323.ps 41992 PostScript
Tune-2522-4323.txt 1344 Plain-text file with the extracted tune(s)
Tune-2522-get.log 4543 Log file, useful mostly for debugging
Tune-25226-get.log 3896 Log file, useful mostly for debugging
Tune-25229-get.log 4003 Log file, useful mostly for debugging
These files should be available for 24 hours.