pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-55735-Harpers_Frolic.ps) >>/Users/jc/w/tmp/Tune-55735-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/montysmaggot.co.uk/Harpers_Frolic.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_55735.log 894 Log file, useful mostly for debugging
Tune-55735-Harpers_Frolic.abc 467 ABC music file with the extracted tune(s)
Tune-55735-Harpers_Frolic.ps 34447 PostScript
Tune-55735-Harpers_Frolic.txt 467 Plain-text file with the extracted tune(s)
Tune-55735-get.log 4955 Log file, useful mostly for debugging
These files should be available for 24 hours.