pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21771-Turnpike.ps) >>/Users/jc/w/tmp/Tune-21771-get.log 2>&1" returned status 256
http://www.rudemex.co.uk/library/ABC/Turnpike gate.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-21771-Turnpike.abc 395 ABC music file with the extracted tune(s)
Tune-21771-Turnpike.ps 34642 PostScript
Tune-21771-Turnpike.txt 395 Plain-text file with the extracted tune(s)
Tune-21771-get.log 4728 Log file, useful mostly for debugging
These files should be available for 24 hours.