Retrieving the COM class factory for component error while generating word document

Question

Hello,

I am trying to edit a word document from VB.NET using for the most part this code:

How to automate Word from Visual Basic .NET to create a new document http://support.microsoft.com/kb/316383

It works fine on my machine but when i publish to the server i get the following error.

Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to the following error: 80070005.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to the following error: 80070005.

The actual error happens when i try to just create a word application object

 Dim oWord As New Word.Application

Using Visual Studio 2008 and VB.NET 3.5. I made a reference to the "Microsoft Word 10.0 Object Library" and i see Interop.Word.dll file in the bin directory.

Using MS Office 2003 on development machine and Windows Server 2003

Still fairly new to .NET and don't have much knowledge about window server, but "UnauthorizedAccessException" sounds like a permission issue. I'm wondering if someone could point me in the right direction on what i might need to do to give my little application access to use word.

Thank you so much for your time.

Answer 1

It definitely sounds like a permissions problem. Are you running your code in a windows service? The service normally runs as Local System, which may not have permission to access the Word object model. Additionally, if word is already running using the credentials of some other user then your program may not be able to access it via COM using different credentials. The office applications tend to be single instance which seems to exacerbate this problem.

Answer 2

It sounds like you may have a permission issue in DCOM. Try editing the Word permissions in DCOM config.

Answer 3

This appears to be what you are experiencing.

http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/006cbbac-101a-40ea-ae16-d59a7a2da8b1

Answer 4

Hello,

I was experiencing the same issue and the problem area I found was "security configuration for Microsoft Word in DCOM". On the following link you can find a step by step guide to know how to config components in DCOM, repeate these steps for WORD, and your problem will be solved.

http://www.biocompsystems.com/%5Fpublic/DCOMConfigurationStepbyStepForXP.doc

Thanks, Sushil Jinder

Answer 5

yes.. the problem is of permission

you just need to enable impersonation.

Go in your web.config file and int the section set

this worked for me!

Hope this is usefule.

--Manish Thakkar

Answer 6

I had the same issue on Windows 2008 R2. Ended up using this post: http://social.msdn.microsoft.com/Forums/en-US/netfx64bit/thread/65a355ce-49c1-47f1-8c12-d9cf5f23c53e

and then changing the impersonation identity user in web.config to another user to solve it.

I'm sure there is a combination of solutions.