Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/DftY/Cantelo.abc/1785"

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_45482.log 464010 Log file, useful mostly for debugging
Tune-45482-1785.abc 149 ABC music file with the extracted tune(s)
Tune-45482-1785.txt 149 Plain-text file with the extracted tune(s)
Tune-45482-get.log 3055 Log file, useful mostly for debugging
These files should be available for 24 hours.