Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book49/CDfNH1783.abc"

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 ]
filesizedescription
Tune-9164-CDfNH1783.abc 148 ABC music file with the extracted tune(s)
Tune-9164-CDfNH1783.txt 148 Plain-text file with the extracted tune(s)
Tune-9164-get.log 8027 Log file, useful mostly for debugging
Tune-91640-get.log 5748 Log file, useful mostly for debugging
Tune-91646-get.log 6285 Log file, useful mostly for debugging
Tune-91647-CSR2-abc2.abc 158 ABC music file with the extracted tune(s)
Tune-91647-CSR2-abc2.ps 6 PostScript
Tune-91647-CSR2-abc2.txt 158 Plain-text file with the extracted tune(s)
Tune-91647-get.log 4046 Log file, useful mostly for debugging
These files should be available for 24 hours.