pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34331-MargaretsWaltzA.ps) >>/Users/jc/w/tmp/Tune-34331-get.log 2>&1" returned status 256
http://www.gregdahms.ca/Tunes/MargaretsWaltzA.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_34331.log 843 Log file, useful mostly for debugging
Tune-34331-MargaretsWaltzA.abc 59 ABC music file with the extracted tune(s)
Tune-34331-MargaretsWaltzA.ps 30954 PostScript
Tune-34331-MargaretsWaltzA.txt 59 Plain-text file with the extracted tune(s)
Tune-34331-get.log 9360 Log file, useful mostly for debugging
These files should be available for 24 hours.