System.Runtime.InteropServices.COMException while working with MS Excel instance

[Shamil]

Hi All,

 

I'm getting the following runtime error while trying to set .Visible property to True of successfully created instance of MS Excel:

 

<<<

An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in WindowsApplication3.exe

 

Additional information: Old format or invalid type library.

>>>

 

I'm automating MS Excel 2000 and as far as I see the reference is set correctly to "Microsoft Excel 9.0 Object Library" and to "Microsoft Office 9.0 Object Library"..

 

the Interop assemblies I have locally in my projects' obj subforlder are the following:

 

Interop.Excel.dll 19.03.1999 20:00 942080

Interop.Office.dll 23.02.2000 02:33 155648

 

As far as I understand they are generated automatically by VS.Net based on MS Excel and MS Office .OLBs, which I set references to. Why they don't work is a real puzzle for me...

 

Any solution anybody?

 

TIA,

Shamil

[Shamil]

Problem solved using the information from http://support.microsoft.com/?kbid=320369

 

Shamil