Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book42/_.abc"

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 ]
filesizedescription
Coll_54353.log 161017 Log file, useful mostly for debugging
Tune-5435-_.abc 140 ABC music file with the extracted tune(s)
Tune-5435-_.txt 140 Plain-text file with the extracted tune(s)
Tune-5435-get.log 2991 Log file, useful mostly for debugging
Tune-54358-get.log 1306 Log file, useful mostly for debugging
Tune-54359-get.log 5325 Log file, useful mostly for debugging
These files should be available for 24 hours.