COM OBJECT CAST TYPE ERROR - Solutions for this

Problem : see the Image

 

 

Solution:

Uninstall and Cleanup:


1. Close all instances of Internet Explorer 2. Download the QCClient_Uninstall92.zip file attached and run this utility.
3. Once the utility is finished, on the client navigate to the path C:\Program Files\Common Files\Mercury Interactive.
4. In the “Mercury Interactive” folder delete either the “TD2000_80” or “Quality Center” folders. If both exist, delete both.
5. On the same client navigate to the %Temp% folder. This will be located in the path: C:\Documents and Settings\<windows_user_id>\Local Settings\Temp. Be sure to supply the windows user ID in the path.
6. Once in the “Temp” folder delete the “TD_80” subfolder. This is better known as the QC Cache. Like “Temporary Internet Files” this can be safely deleted. It will be recreated upon the next logon to Quality Center.
7. Navigate to the path: C:\WINDOWS\Downloaded Program Files 8. In the “Downloaded Program Files” folder right click on the “LoaderClass v4" and select “Remove”
9. Click Start>Control Panel>Add or Remove Programs 10. In the Add/Remove programs section look for “Microsoft .NET Framework 2.0”
11. Select the “Microsoft .NET Framework 2.0” and click the “Remove” button. Let the uninstall finish.
12. Open Internet Explorer, navigate to your Quality Center server and let the client load. The .Net CFramework 2.0 will reinstall.
After that, lets proceed as follow in order to clean up the temporary files:
1. Go to C:\Program files\Common Files and rename Mercury Interactive folder. 
2. Open a new IE browser. Go to Tools ->Internet Options -> setting s-> View Objects. Remove all the loader class files from the window.
3. Try to access QC again. it will perform a fresh installation of client files.

 

Source : http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1263729

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