pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2192-MacArthurLisa.ps) >>/Users/jc/w/tmp/Tune-2192-get.log 2>&1" returned status 256
http://www.cranfordpub.com/tunes/abcs/MacArthurLisa.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
Tune-2192-MacArthurLisa.abc 444 ABC music file with the extracted tune(s)
Tune-2192-MacArthurLisa.ps 36123 PostScript
Tune-2192-MacArthurLisa.txt 444 Plain-text file with the extracted tune(s)
Tune-2192-get.log 6672 Log file, useful mostly for debugging
These files should be available for 24 hours.