pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-31451-DukeofYorksMarch_PLFD1665_173.ps) >>/Users/jc/w/tmp/Tune-31451-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/DukeofYorksMarch_PLFD1665_173.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-31451-DukeofYorksMarch_PLFD1665_173.abc 367 ABC music file with the extracted tune(s)
Tune-31451-DukeofYorksMarch_PLFD1665_173.ps 33547 PostScript
Tune-31451-DukeofYorksMarch_PLFD1665_173.txt 367 Plain-text file with the extracted tune(s)
Tune-31451-get.log 4921 Log file, useful mostly for debugging
These files should be available for 24 hours.