Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/DukeOfFyfesWelcomeToDeeside.abc/500"

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_6503.log 342760 Log file, useful mostly for debugging
Coll_65030.log 2548708 Log file, useful mostly for debugging
Coll_65031.log 448527 Log file, useful mostly for debugging
Coll_65032.log 1897745 Log file, useful mostly for debugging
Coll_65033.log 478468 Log file, useful mostly for debugging
Coll_65035.log 1524579 Log file, useful mostly for debugging
Coll_65037.log 338589 Log file, useful mostly for debugging
Coll_65038.log 4042704 Log file, useful mostly for debugging
List65039.log 158 Log file, useful mostly for debugging
Tune-6503-500.abc 367 ABC music file with the extracted tune(s)
Tune-6503-500.txt 367 Plain-text file with the extracted tune(s)
Tune-6503-get.log 7448 Log file, useful mostly for debugging
Tune-65030-get.log 14712 Log file, useful mostly for debugging
Tune-65032-get.log 4278 Log file, useful mostly for debugging
Tune-65035-get.log 7803 Log file, useful mostly for debugging
Tune-65036-get.log 5171 Log file, useful mostly for debugging
Tune-65037-get.log 7592 Log file, useful mostly for debugging
Tune-65038-get.log 8396 Log file, useful mostly for debugging
Tune-65039-get.log 5193 Log file, useful mostly for debugging
These files should be available for 24 hours.