pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22911-31151_.ps) >>/Users/jc/w/tmp/Tune-22911-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/31151_.abc

Error exit status 256; here are some files to check:

[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-22911-31151_.abc 33 ABC music file with the extracted tune(s)
Tune-22911-31151_.ps 6 PostScript
Tune-22911-31151_.txt 33 Plain-text file with the extracted tune(s)
Tune-22911-get.log 3946 Log file, useful mostly for debugging
These files should be available for 24 hours.