Unable to Cast 'DOORSCOMLib.DOORSClass' to interface type 'DOORSCOMLib.IDoorsStatus'

Hi I'm Using the below code to create an Instance in Doors from my c# code

            doorsStatus = Activator.CreateInstance(typeof(DOORSClass)) as IDoorsStatus; // This line worked  as expected for such long time

but now I'm getting an error like this :

Unable to cast COM object of type 'DOORSCOMLib.DOORSClass' to interface type 'DOORSCOMLib.IDoorsStatus'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{9BDD61A5-4E39-480B-950B-73B6CFD7DC58}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))

What am i missing here

Thanks in advance

Nabil Saleem

Re: Unable to Cast 'DOORSCOMLib.DOORSClass' to interface type 'DOORSCOMLib.IDoorsStatus'
Costas..Aravidis - Tue Dec 15 08:26:25 EST 2015

Hi Nabil,

Which version of DOORS are you running?

Have you updated lately?

Kind regards,

Costas

Re: Unable to Cast 'DOORSCOMLib.DOORSClass' to interface type 'DOORSCOMLib.IDoorsStatus'
maknabil - Tue Dec 15 23:25:49 EST 2015

Costas, Thanks for your reply.

I'm using Doors v9.6. not updated it.

It was working perfectly in my development machine. Then I made an installer out of it and ran it on the same (Development) machine it also ran successfully.

After I uninstall the setup. I got this casting error.

If I ran the code with installer installed things are working perfectly. Uninstallation of installer, deletes some file from the registry causes this casting error.

Do someone has experienced similar issue? I have no clue which file got corrupted.

Do I need to register DoorsLibCom somewhere to make this happen?

Thanks in advance

Best Regards,

Nabil Saleem.