pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-59070-761_Flight.ps) >>/Users/jc/w/tmp/Tune-59070-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1779/Thompson/761_Flight.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_59070.log 128614 Log file, useful mostly for debugging
Tune-59070-761_Flight.abc 841 ABC music file with the extracted tune(s)
Tune-59070-761_Flight.ps 34077 PostScript
Tune-59070-761_Flight.txt 841 Plain-text file with the extracted tune(s)
Tune-59070-get.log 4465 Log file, useful mostly for debugging
These files should be available for 24 hours.