Mismatch: X:31 doesn't match requested X:32
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-13750-TravailMercredi.ps) >>/Users/jc/w/tmp/Tune-13750-get.log 2>&1" returned status 256
http://michel.bellon.free.fr/Musique/abc/Nouveau/TravailMercredi.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-13750-TravailMercredi.abc 726 ABC music file with the extracted tune(s)
Tune-13750-TravailMercredi.ps 41271 PostScript
Tune-13750-TravailMercredi.txt 726 Plain-text file with the extracted tune(s)
Tune-13750-get.log 18072 Log file, useful mostly for debugging
These files should be available for 24 hours.