[Exim] eximstats errors

When I run eximstats, it seems to work but I get the following errors:

Use of uninitialized value in concatenation (.) at (eval 27) line 53, line
7699.
Use of uninitialized value in concatenation (.) at (eval 27) line 53, line
11493.
Use of uninitialized value in concatenation (.) at (eval 27) line 53, line
17353.

Can anyone offer any insight? I've done some searching through the
relevant files, but haven't been able to make sense of it.

Thanks.

--
Mark Edwards
San Francisco, CA