pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-53191-Sweet____.ps) >>/Users/jc/w/tmp/Tune-53191-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/LM/Sweet____.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-53191-Sweet____.abc 1523 ABC music file with the extracted tune(s)
Tune-53191-Sweet____.ps 40271 PostScript
Tune-53191-Sweet____.txt 1523 Plain-text file with the extracted tune(s)
Tune-53191-get.log 4837 Log file, useful mostly for debugging
These files should be available for 24 hours.