TF86001 Error Using TFS Excel Integration

Question

All,
Any help and insight would be appreciated.  I have installed the Workgroup edition of TFS 2005 w/SP1 on a Win2003 Server.  I am running VS 2005 Team Software w/SP1 on XP SP2, with Team Explorer.  I have Office 2003 Pro with all patches.
I continue to get the TF86001 error:
TF86001: Team Foundation was unable to load the Office AddIn.
This ONLY happens with Excel, my Project 2003 integration works fine.
Here's what I've tried:
I've gone into Add/Remove Programs to ensure that I have .NET Programmability Support enabled for Excel under the Office Pro 2003 entry.  I've even unchecked it and rechecked it to try to get it to reinstall.
I've repaired the Visual Studio 2005 Office Runtime (multiple times) and then tried repairing the Team Explorer client (multiple times).
I've uninstalled Team Explorer, then Office, then reinstalled Office, ran updates, reinstalled Team Explorer, etc.  Same results - Project works, Excel doesn't.
I have reviewed the Team Explorer install logs from my computer and a computer that the Excel support works on, and can only find marginal differences, no errors.  Team Explorer install always completes successfully.
By inspecting and traversing the registry, it seems to me that some of this functionality is encapsulated in the file TFSOfficeAdd-inUI.dll, located in my C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\1033 directory.  I've re-registered this file using regsvr32.
I've also played around with reregistering DLLs that I can find in: C:\Program Files\Microsoft Visual Studio 8\Visual Studio Tools for Office.  No success there either.
I don't know what to do next.  I'm considering calling PSS, but have not had much luck the last few times I've called.  Can anyone point me in the right direction?  Is there a hotfix for this problem?  Thanks in advance.
Thanks,
rockman88

Answer 1

Dennis,
The last part of you suggestion, about 'Excel.exe.config', did the trick.  In fact I did have that config file in my C:\Program Files\Microsoft Office\OFFICE11 folder.
It's contents are as follows:
Code Snippet<?xml version="1.0"?>
<configuration>
 <startup>
  <supportedRuntime version="v1.1.4322"/>
  <supportedRuntime version="v1.0.3705"/>
  <requiredRuntime version="v1.0.3705"/>
 </startup>
</configuration>
Obviously, for .NET framework 2.0, that isn't going to work.  I removed the file and it works now.
I do have two additional questions:
Would it have worked if I had simply added a new <supportedRuntime /> entry for 2.0 and should I do that?
I have also noticed now that from withing Visual Studio Team 2005, there is a toolbar, the "Work Item Tracking - Results View" toolbar.  This has an Excel button on it, to view the current selection in Excel.  I notice that, even after I remove the Excel.exe.confg file, when I click this button when viewing a work items query, I get an error MessageBox that states: "Interface not registered (Exception from HRESULT: 0x80040155)" with a critical (red X) icon.  Any ideas on how to fix this (can I re-register something)?
Thanks in advance,
Erik (rockman88)