pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41168-Montys_Maggot_Favourite_Tunes.ps) >>/Users/jc/w/tmp/Tune-41168-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/montysmaggot.co.uk/Montys_Maggot_Favourite_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
Form_41168.log 1615 Log file, useful mostly for debugging
Tune-41168-Montys_Maggot_Favourite_Tunes.abc 223 ABC music file with the extracted tune(s)
Tune-41168-Montys_Maggot_Favourite_Tunes.ps 34175 PostScript
Tune-41168-Montys_Maggot_Favourite_Tunes.txt 223 Plain-text file with the extracted tune(s)
Tune-41168-get.log 4720 Log file, useful mostly for debugging
These files should be available for 24 hours.