Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/DftY/Thompson.abc/1804"

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Coll_25472.log 142160 Log file, useful mostly for debugging
Coll_25473.log 520211 Log file, useful mostly for debugging
Form_25470.log 875 Log file, useful mostly for debugging
Form_25471.log 844 Log file, useful mostly for debugging
Form_25472.log 888 Log file, useful mostly for debugging
Form_25473.log 828 Log file, useful mostly for debugging
Form_25477.log 942 Log file, useful mostly for debugging
Tune-2547-1804.abc 150 ABC music file with the extracted tune(s)
Tune-2547-1804.txt 150 Plain-text file with the extracted tune(s)
Tune-2547-get.log 3049 Log file, useful mostly for debugging
Tune-25471-AccordForPinewoods.abc 1172 ABC music file with the extracted tune(s)
Tune-25471-AccordForPinewoods.ps 41255 PostScript
Tune-25471-AccordForPinewoods.txt 1172 Plain-text file with the extracted tune(s)
Tune-25471-get.log 5084 Log file, useful mostly for debugging
Tune-25475-get.log 4000 Log file, useful mostly for debugging
Tune-25476-get.log 1460 Log file, useful mostly for debugging
These files should be available for 24 hours.