pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2823-hundred_pipers.ps) >>/Users/jc/w/tmp/Tune-2823-get.log 2>&1" returned status 256
http://www.oxfordfiddle.co.uk/hundred_pipers.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
Form_28236.log 1750 Log file, useful mostly for debugging
Tune-2823-get.log 4358 Log file, useful mostly for debugging
Tune-2823-hundred_pipers.abc 372 ABC music file with the extracted tune(s)
Tune-2823-hundred_pipers.ps 35651 PostScript
Tune-2823-hundred_pipers.txt 372 Plain-text file with the extracted tune(s)
Tune-28232-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.