pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-25937-playford.ps) >>/Users/jc/w/tmp/Tune-25937-get.log 2>&1" returned status 256
http://www.andyhornby.net/Music/playford tunes.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-25937-get.log 15708 Log file, useful mostly for debugging
Tune-25937-playford.abc 301 ABC music file with the extracted tune(s)
Tune-25937-playford.ps 35370 PostScript
Tune-25937-playford.txt 301 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.