pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12687-AngelsUnaware.ps) >>/Users/jc/w/tmp/Tune-12687-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/England/xmas/AngelsUnaware.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-12687-AngelsUnaware.abc 535 ABC music file with the extracted tune(s)
Tune-12687-AngelsUnaware.ps 35507 PostScript
Tune-12687-AngelsUnaware.txt 535 Plain-text file with the extracted tune(s)
Tune-12687-get.log 4321 Log file, useful mostly for debugging
These files should be available for 24 hours.