pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-79426-Mortons_Maggot.ps) >>/Users/jc/w/tmp/Tune-79426-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/GM/Mortons_Maggot.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-79426-Mortons_Maggot.abc 786 ABC music file with the extracted tune(s)
Tune-79426-Mortons_Maggot.ps 34562 PostScript
Tune-79426-Mortons_Maggot.txt 786 Plain-text file with the extracted tune(s)
Tune-79426-get.log 4430 Log file, useful mostly for debugging
These files should be available for 24 hours.