Undocumented Error in microsoft report designer

I have upgraded my application from vs2005 to vs 2010.

Existing reports (rdlc) are working poperly.But i couldnt be able to modify existing dataset or add new dataset.

When I try to do so, an error message box comes stating 'Undocumented Error'.When I take the detail of the error message,it has given some dll version error.I tried deleting and adding the mentioned dll.But no way.

Please help to solve the issue and it is urgent also.

Thanks and Regards

Shalu

Re: Undocumented Error in microsoft report designer

check the thread, may be it help"

http://forums.asp.net/t/1683259.aspx/1