pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92695-messer.ps) >>/Users/jc/w/tmp/Tune-92695-get.log 2>&1" returned status 256
http://www.alfwarnock.info/alfs/abc/messer.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
Coll_92695.log 141597 Log file, useful mostly for debugging
Form_92695.log 859 Log file, useful mostly for debugging
Tune-92695-get.log 7375 Log file, useful mostly for debugging
Tune-92695-messer.abc 236 ABC music file with the extracted tune(s)
Tune-92695-messer.ps 36175 PostScript
Tune-92695-messer.txt 236 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.