Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1783/BB50.abc"

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 ]
filesizedescription
Coll_21118.log 684758 Log file, useful mostly for debugging
Find_21111.log 1717 Log file, useful mostly for debugging
Tune-2111-BB50.abc 141 ABC music file with the extracted tune(s)
Tune-2111-BB50.txt 141 Plain-text file with the extracted tune(s)
Tune-2111-get.log 3035 Log file, useful mostly for debugging
These files should be available for 24 hours.