Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/DftY/Preston.abc/1798"

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_6575.log 454209 Log file, useful mostly for debugging
Coll_65752.log 916820 Log file, useful mostly for debugging
Coll_65754.log 286209 Log file, useful mostly for debugging
Coll_65755.log 441609 Log file, useful mostly for debugging
Form_65754.log 866 Log file, useful mostly for debugging
Tune-6575-1798.abc 149 ABC music file with the extracted tune(s)
Tune-6575-1798.txt 149 Plain-text file with the extracted tune(s)
Tune-6575-get.log 3041 Log file, useful mostly for debugging
These files should be available for 24 hours.