pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-89050-128_Dancing_Song.ps) >>/Users/jc/w/tmp/Tune-89050-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EverydaySongBook/128_Dancing_Song.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-89050-128_Dancing_Song.abc 1019 ABC music file with the extracted tune(s)
Tune-89050-128_Dancing_Song.ps 34749 PostScript
Tune-89050-128_Dancing_Song.txt 1019 Plain-text file with the extracted tune(s)
Tune-89050-get.log 4603 Log file, useful mostly for debugging
These files should be available for 24 hours.