pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24871-Go_to_Berwick_Johnny_2.ps) >>/Users/jc/w/tmp/Tune-24871-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/kirby98.fsnet.co.uk/go/Go_to_Berwick_Johnny_2.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-24871-Go_to_Berwick_Johnny_2.abc 308 ABC music file with the extracted tune(s)
Tune-24871-Go_to_Berwick_Johnny_2.ps 33897 PostScript
Tune-24871-Go_to_Berwick_Johnny_2.txt 308 Plain-text file with the extracted tune(s)
Tune-24871-get.log 4631 Log file, useful mostly for debugging
These files should be available for 24 hours.