pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21483-mas.ps) >>/Users/jc/w/tmp/Tune-21483-get.log 2>&1" returned status 256
http://www.ellwood.org/slow/mas.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-21483-get.log 4077 Log file, useful mostly for debugging
Tune-21483-mas.abc 257 ABC music file with the extracted tune(s)
Tune-21483-mas.ps 35281 PostScript
Tune-21483-mas.txt 257 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.