pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24095-nunkomm660.ps) >>/Users/jc/w/tmp/Tune-24095-get.log 2>&1" returned status 256
http://moinejf.free.fr/abc/nunkomm660.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-24095-get.log 4665 Log file, useful mostly for debugging
Tune-24095-nunkomm660.abc 3367 ABC music file with the extracted tune(s)
Tune-24095-nunkomm660.ps 94857 PostScript
Tune-24095-nunkomm660.txt 3367 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.