pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-77227-2165_Lord_John_Campbell.ps) >>/Users/jc/w/tmp/Tune-77227-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM2/2165_Lord_John_Campbell.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-77227-2165_Lord_John_Campbell.abc 788 ABC music file with the extracted tune(s)
Tune-77227-2165_Lord_John_Campbell.ps 40712 PostScript
Tune-77227-2165_Lord_John_Campbell.txt 788 Plain-text file with the extracted tune(s)
Tune-77227-get.log 5074 Log file, useful mostly for debugging
These files should be available for 24 hours.