pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88357-Chansons.ps) >>/Users/jc/w/tmp/Tune-88357-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/galouvielle.free.fr/Chansons%20pour%20Elisabeth.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-88357-Chansons.abc 480 ABC music file with the extracted tune(s)
Tune-88357-Chansons.ps 33304 PostScript
Tune-88357-Chansons.txt 480 Plain-text file with the extracted tune(s)
Tune-88357-get.log 319778 Log file, useful mostly for debugging
These files should be available for 24 hours.