Pkg exim4 users - Oct 2009 - no such file

I''m getting the following error message: "exim paniclog 
/var/log/exim4/paniclog on localhost has non-zero size, mail system 
might be broken". Only problem is there is no such file:

[holtzm at localhost]~$ ls -a /var/log/exim4
.  ..  mainlog

I''m running exim4 4.69-2 on ubuntu 8.04.

Any ideas? Pointers appreciated.

-- 
Bob Holtzman
Key ID: 8D549279
"If you think you''re getting free lunch,
  check the price of the beer"