Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/GM/Tom_Jones.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_76311.log 702617 Log file, useful mostly for debugging
Coll_76312.log 455611 Log file, useful mostly for debugging
Coll_76315.log 1134431 Log file, useful mostly for debugging
Form_76310.log 1046 Log file, useful mostly for debugging
Tune-7631-1750.abc 149 ABC music file with the extracted tune(s)
Tune-7631-1750.txt 149 Plain-text file with the extracted tune(s)
Tune-7631-get.log 3043 Log file, useful mostly for debugging
Tune-76317-get.log 4445 Log file, useful mostly for debugging
These files should be available for 24 hours.