pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4419-3171.ps) >>/Users/jc/w/tmp/Tune-4419-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/3171=Jacks_Alive.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_44190.log 1308576 Log file, useful mostly for debugging
Coll_44192.log 244991 Log file, useful mostly for debugging
Form_44194.log 866 Log file, useful mostly for debugging
Tune-4419-3171.abc 1274 ABC music file with the extracted tune(s)
Tune-4419-3171.ps 40805 PostScript
Tune-4419-3171.txt 1274 Plain-text file with the extracted tune(s)
Tune-4419-get.log 4529 Log file, useful mostly for debugging
Tune-44190-get.log 4697 Log file, useful mostly for debugging
Tune-44194-get.log 3949 Log file, useful mostly for debugging
These files should be available for 24 hours.