Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Grocer.abc/500"

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Tune-8937-500.abc 382 ABC music file with the extracted tune(s)
Tune-8937-500.txt 382 Plain-text file with the extracted tune(s)
Tune-8937-get.log 2973 Log file, useful mostly for debugging
Tune-89370-FairJennysJig.ps 6 PostScript
Tune-89371-FugalFergus0.abc 176 ABC music file with the extracted tune(s)
Tune-89371-FugalFergus0.txt 176 Plain-text file with the extracted tune(s)
Tune-89374-get.log 8615 Log file, useful mostly for debugging
Tune-89375-BirksOfInvermay4.abc 184 ABC music file with the extracted tune(s)
Tune-89375-BirksOfInvermay4.txt 184 Plain-text file with the extracted tune(s)
Tune-89375-get.log 4301 Log file, useful mostly for debugging
These files should be available for 24 hours.