pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-26564-arbeau.ps) >>/Users/jc/w/tmp/Tune-26564-get.log 2>&1" returned status 256
http://anamnese.online.fr/abc/arbeau.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-26564-arbeau.abc 209 ABC music file with the extracted tune(s)
Tune-26564-arbeau.ps 31520 PostScript
Tune-26564-arbeau.txt 209 Plain-text file with the extracted tune(s)
Tune-26564-get.log 4228 Log file, useful mostly for debugging
These files should be available for 24 hours.