pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99139-_CCD_.ps) >>/Users/jc/w/tmp/Tune-99139-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CaledonianCountryDances/_CCD_.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-99139-_CCD_.abc 1273 ABC music file with the extracted tune(s)
Tune-99139-_CCD_.ps 39779 PostScript
Tune-99139-_CCD_.txt 1273 Plain-text file with the extracted tune(s)
Tune-99139-get.log 9597 Log file, useful mostly for debugging
These files should be available for 24 hours.