Can't launch outlook in visual studio through TFS add-in

Question

I am using visual studio 2013 with Team foundation Server add-in. Opening up a TFS task/bug item, there is a outlook icon button, which allow me to open up outlook new email with the TFS item title.

my visual studio runs in administrator mode. I have two office versions installed (office 2013 and office 2016.) Each time when I switch office versions, I will do a repair for the office version. and most time I was using office 2013 and everything works fine including open outlook through TFS add-on.

today, suddenly I couldn't open outlook through the TFS add-on, the error is

Unable to cast COM object of type 'Microsoft.Office.Interop.Outlook.ApplicationClass' to interface type 'Microsoft.Office.Interop.Outlook._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00063001-0000-0000-C000-000000000046}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)).

I repaired office 2013, but didn't work.

some one knows other possibilities of the issue?

thanks.

Answer 1

The root issue is that the Version reference for the TypeLib created by the Outlook installation is pointing to a incorrect value.

The root issue is that their is a problem with the Outlook installation Common Object Model (COM) interface where the version referencefor the TypeLib entry set by the Outlook installation is pointing to a incorrect value/version or that version does not point to a correct location. If you continue to have issues then you may beed to reinstall Microsoft Outlook. Repairing the Outlook installation does not fix this issue so a reinstall is suggested.

Just following the steps mentioned in below article to fix that: https://www.fieldstonsoftware.com/support/support_gsyncit_8002801D.shtml

Just verify that with Regedit.exe, check below keys:

 HKEY_CLASSES_ROOT\Interface\{00063001-0000-0000-C000-000000000046}\TypeLib

 HKEY_CLASSES_ROOT\TypeLib\{00062FFF-0000-0000-C000-000000000046}

Verify if the type library (GUID should be {00062FFF-0000-0000-C000-000000000046}) is indeed properly registered, using the correct type library version number.

Answer 2

Andy's post is right. you can follow the instructions to find out the issue.

Office 2016 registry key is 9.6, on my machine, even I uninstalled office 2016, the registry key 9.6 still exists at

Computer\HKEY_CLASSES_ROOT\TypeLib{00062FFF-0000-0000-C000-000000000046}

After deleting it, TFS office add-on works fine now. I think the add-on is trying to use the latest version and it causes the issue.