pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41224-Pop_Goes_the_Weasel.ps) >>/Users/jc/w/tmp/Tune-41224-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/homepages.inf.ed.ac.uk/s0570628/Pop_Goes_the_Weasel.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-41224-Pop_Goes_the_Weasel.abc 260 ABC music file with the extracted tune(s)
Tune-41224-Pop_Goes_the_Weasel.ps 34173 PostScript
Tune-41224-Pop_Goes_the_Weasel.txt 260 Plain-text file with the extracted tune(s)
Tune-41224-get.log 7801 Log file, useful mostly for debugging
These files should be available for 24 hours.