Where did the Add-in for Analysis Services come from? Have you checked
the website of the vendor for any reported problems? If the vendor is
MS, check support.microsoft.com

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Regards,

Tushar Mehta
www.tushar-mehta.com
Excel, PowerPoint, and VBA add-ins, tutorials
Custom MS Office productivity solutions

In article ,
says...
Trying to use the new Add-in for Analysis Services in Excel 2003, running on
Win XP SP1.
Trying to connect the Add-in to AS via http.
I get the following error: "OLAP Server error: Unspecified error"

However, when I connect to the same AS, also via http, this time using the
regular Excel menu (Data, Import External Data, Import Data... etc..), I can
connect without a problem.

What is different about this new add-in that prevents me to connect to my
Analysis Server?