pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-95107-polka.ps) >>/Users/jc/w/tmp/Tune-95107-get.log 2>&1" returned status 256
http://michel.bellon.free.fr/Musique/abc/polka.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-95107-get.log 7759 Log file, useful mostly for debugging
Tune-95107-polka.abc 325 ABC music file with the extracted tune(s)
Tune-95107-polka.ps 33574 PostScript
Tune-95107-polka.txt 325 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.