Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/GM/Don_Jumpedo.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_7742.log 438810 Log file, useful mostly for debugging
Coll_77425.log 564831 Log file, useful mostly for debugging
Coll_77427.log 444410 Log file, useful mostly for debugging
Form_7742.log 1003 Log file, useful mostly for debugging
Tune-7742-1750.abc 151 ABC music file with the extracted tune(s)
Tune-7742-1750.txt 151 Plain-text file with the extracted tune(s)
Tune-7742-get.log 3055 Log file, useful mostly for debugging
Tune-77422-get.log 4262 Log file, useful mostly for debugging
Tune-77426-get.log 4669 Log file, useful mostly for debugging
Tune-77428-get.log 7163 Log file, useful mostly for debugging
These files should be available for 24 hours.