Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/DftY/Thompson.abc/1780"

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 ]
filesizedescription
Coll_83961.log 4768 Log file, useful mostly for debugging
Tune-83961-1780.abc 150 ABC music file with the extracted tune(s)
Tune-83961-1780.txt 150 Plain-text file with the extracted tune(s)
Tune-83961-get.log 3059 Log file, useful mostly for debugging
These files should be available for 24 hours.