Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book18/BB50.abc"

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 ]
filesizedescription
Tune-9153-BB50.abc 143 ABC music file with the extracted tune(s)
Tune-9153-BB50.txt 143 Plain-text file with the extracted tune(s)
Tune-9153-get.log 4421 Log file, useful mostly for debugging
Tune-91531-LondonMagazine.abc 153 ABC music file with the extracted tune(s)
Tune-91531-LondonMagazine.ps 6 PostScript
Tune-91531-LondonMagazine.txt 153 Plain-text file with the extracted tune(s)
Tune-91531-get.log 4087 Log file, useful mostly for debugging
Tune-91533-get.log 3320 Log file, useful mostly for debugging
Tune-91534-get.log 4213 Log file, useful mostly for debugging
Tune-91537-get.log 9602 Log file, useful mostly for debugging
These files should be available for 24 hours.