Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/GM/Mortons_Maggot.abc/1753"

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_77542.log 445810 Log file, useful mostly for debugging
Tune-77542-1753.abc 154 ABC music file with the extracted tune(s)
Tune-77542-1753.txt 154 Plain-text file with the extracted tune(s)
Tune-77542-get.log 4460 Log file, useful mostly for debugging
These files should be available for 24 hours.