OK, I should have known that for the name Schnieder.
You didn't have a colon (

at the end so I did not realize that the
text that followed it was the actual error message, but my bad still.
So the mutlti-select is on the filters, and not a multiple-cell
selection, thanks for the details.
Thus the resultset (row and column) represents a blended result for
Germany & Italy (we all remember the last time those two countries
were combined, so be careful!

). I don't like that that is the way
any UI handles it...for this, it ought to provide multiple grids, and
not just blend them into one, at least I'd prefer the former being an
option.
You might try to build a simple ASP or ASP.Net page that you could
pass it a SQL Query that would reach out to the relational database to
retrieve the Facts for the right facts rows. It would generally be
simple to build the SQL dynamically from MDX functions. Try to do
simple simple stuff to get the DimA.CurrentMember.Name and so on to
get the right stuff to display. Then only thing that might be
challenging is the multi-select filter stuff because the CurrentMember
function wold be peculiar becauise there would be more than one. Not
sure on this part of it via MDX. Maybe there would be something in
VBA from Excel in the PTS object model that would expose that part of
the problem.
All of this seems like a lot of trouble, so not sure how inflexible
the en-users would be in just having the single-select drill through
and not the multi-select.
Here is a guy from a couple years ago who had the same problem:
http://blogs.msdn.com/toffer/archive/2006/03/28/563439.aspx
And Mosha put something up about 3 years ago:
http://www.mosha.com/msolap/articles/mdxmultiselectcalcs.htm
I would look at the PTS model through VBA and Excel exposing the mutli-
select items, pulling them via the code and dynamically building SQL
and passing that query over to an ASP page. Somewhat of a pain, more
of a pain to get all the syntax just right than anything terribly
complex.
-exologic
>> Stay informed about: Drill Through for Multiple Cells