Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/GM/Worse_for_Better.abc/1750"

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_85630.log 876217 Log file, useful mostly for debugging
Form_85634.log 1020 Log file, useful mostly for debugging
Tune-8563-1750.abc 156 ABC music file with the extracted tune(s)
Tune-8563-1750.txt 156 Plain-text file with the extracted tune(s)
Tune-8563-get.log 3087 Log file, useful mostly for debugging
Tune-85631-get.log 5692 Log file, useful mostly for debugging
Tune-85637-get.log 3106 Log file, useful mostly for debugging
These files should be available for 24 hours.