On Mon, 30 Aug 2010 11:57:14 -0700, Markus Heller <hellerm2@gmail.com> wrote:
> 
> Hello all,
> 
> I'm stuck with a weird issue:
> 
> When I tried to invoke any agenda view, e.g. C-c a a, I get the
> following message in the minibuffer:
> 
> non-existing agenda file h:/org/career.org [R]emove from list or
> [A]bort?
> 
> I type "R" to remove it, get my agenda view, and then I switch the
> buffer to Career.org and hit C-[ and get "file added to front of agenda
> list", but when I try C-c a a again, I get the message above about the
> non-existing agenda file.
> 
> What's going on here?
> 
> Thanks and Cheers
> Markus
> 
> PS: My org is 7.01trans, release_7.01h-229-gb212 on emacs 23.1

I assume you're on MS Windows here...  what is the value of
org-agenda-files after you add the file?  is case (Career versus
career) an issue?  You say "I switch the buffer to Career.org"; have
you actually saved the file?

Sorry if I can't be of more help.