pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21028-Montys.ps) >>/Users/jc/w/tmp/Tune-21028-get.log 2>&1" returned status 256
http://www.montysmaggot.co.uk/files/Montys Maggot Favourite Dance 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-21028-Montys.abc 613 ABC music file with the extracted tune(s)
Tune-21028-Montys.ps 37478 PostScript
Tune-21028-Montys.txt 613 Plain-text file with the extracted tune(s)
Tune-21028-get.log 94575 Log file, useful mostly for debugging
These files should be available for 24 hours.