Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/GftF/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-20558-BB50.abc 141 ABC music file with the extracted tune(s)
Tune-20558-BB50.txt 141 Plain-text file with the extracted tune(s)
Tune-20558-Gow-CSR1-abc1.abc 149 ABC music file with the extracted tune(s)
Tune-20558-Gow-CSR1-abc1.ps 6 PostScript
Tune-20558-Gow-CSR1-abc1.txt 149 Plain-text file with the extracted tune(s)
Tune-20558-get.log 7214 Log file, useful mostly for debugging
These files should be available for 24 hours.