pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54602-John.ps) >>/Users/jc/w/tmp/Tune-54602-get.log 2>&1" returned status 256
http://www.andyhornby.net/Music/John Winder MS.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-54602-John.abc 393 ABC music file with the extracted tune(s)
Tune-54602-John.ps 34512 PostScript
Tune-54602-John.txt 393 Plain-text file with the extracted tune(s)
Tune-54602-get.log 18506 Log file, useful mostly for debugging
These files should be available for 24 hours.