Hi all...

We're having problems attempting with Excel 2007 crashing when referencing a
lookup table in Worksheet 'B' from Worksheet 'A' during a NETWORKDAYS
call....  In more detail...

Worksheet 'A' has a list of rows including two date columns.  We're
attempting to workout the difference in working days between the two date
columns taking into account a list of "holiday" dates contained within
Worksheet 'B'.   We are using NETWORKDAYS function for this.

Everything works fine whilst Worksheet 'B' is open, however when you close
Worksheet 'B' (or open Worksheet 'A' from a freshly opened Excel) then Excel
will crash & burn (restart of Excel required).

Some things I've tried...

Worksheet A & B both live on Network shares with the same access rights to
the logged on client who's using Excel.

Replacing NETWORKDAYS with any other innocuous call (ie VLOOKUP) does not
crash Excel, even though it's referencing the lookup table in Worksheet 'B'
which is NOT open.

I've used the Trust Centre to fully trust all I can (as an experiment)
however this seems to have no affect and still causes the Excel Crash.

My thoughts...

My understanding is that in previous versions of Excel the NETWORKDAYS
function was included in an Analysis Toolpack - implying that it was either
a VB Macro or Excel Add-in based function.   I'm assuming there's some kind
of problem interpreting the path to the Excel file for (in our case
Worksheet 'B') Or there may be a rights issue (although I've almost
discounted that by locating Worksheet 'B' in various network / local
locations).

Any help would be appreciated folks!

Paul