404 strange error. What is it?

404 /_vti_bin/owssvr.dll 404 /msoffice/cltreq.asp

[silverbytes]

#65, length=139
404 /_vti_bin/owssvr.dll
404 /msoffice/cltreq.asp

?

What does that means? Iīm trying to fix my 404 errors but I donīt know what is it...

[pendanticist]

Someone using Front Page to look at your work?

Pendanticist.