pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21280-Quadrille.ps) >>/Users/jc/w/tmp/Tune-21280-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnWalsh/Quadrille.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_21280.log 448611 Log file, useful mostly for debugging
Tune-21280-Quadrille.abc 1444 ABC music file with the extracted tune(s)
Tune-21280-Quadrille.ps 35161 PostScript
Tune-21280-Quadrille.txt 1444 Plain-text file with the extracted tune(s)
Tune-21280-get.log 4371 Log file, useful mostly for debugging
These files should be available for 24 hours.