Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/cache/Gow-CSR4-abc1.abc"

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 ]
filesizedescription
Sess-73075.log 2941312 Log file, useful mostly for debugging
Tune-7307-Gow-CSR4-abc1.abc 151 ABC music file with the extracted tune(s)
Tune-7307-Gow-CSR4-abc1.txt 151 Plain-text file with the extracted tune(s)
Tune-7307-get.log 3207 Log file, useful mostly for debugging
Tune-73071-get.log 10243 Log file, useful mostly for debugging
Tune-73076-get.log 5317 Log file, useful mostly for debugging
Tune-73077-get.log 5216 Log file, useful mostly for debugging
These files should be available for 24 hours.