I'm getting a #N/A error in formulas that link to closed
workbooks.

Using Excel 2000 Column A in a closed workbook (book2) has a list of
names in last, first format.  In an open workbook (book1) column A has
a simple "if" formula that says if the same cell in the closed
workbook contains "" then show "" otherwise show contents of same cell
in closed workbook.

The formula repeates for 200 rows and most of the time it works fine.
In many cases the formula returns a #N/A for cells with valid data in
them.  The error seems to be specific to certain names and sometimes
changing the spelling or case of the name in the closed workbook fixes
the problem, sometimes not.  If I open the closed workbook all the
errors clear and data shows correctly until the next time I refresh
the links with book2 closed.

Why if the formula is correct and the data in the closed book is valid
would this happen on some entries and not others and how do I correct
this?  I can't just hide the error I need the data.  HELP!!!

Tom G.