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Error: CLSID {3FA7DEB3-6438-101B-ACC1-00AA00423326} failed with error 80040154. 

I was dealing with a MAPI application in C# and when I tried to call the following code I got a nasty error message:

MAPI.Session session = new MAPI.Session();

The actual error message I received was

Error: Retrieving the COM class factory for component with CLSID {3FA7DEB3-6438-101B-ACC1-00AA00423326} failed due to the following error: 80040154.

My development environment is:

  • Windows Vista Ultimate x64
  • Microsoft Visual Studio 2005

I found that my application Platform Target was set to Any CPU, changing this to X86 resolved the error.

image

posted on Monday, September 17, 2007 9:59 AM |

Comments


# re: Error: CLSID {3FA7DEB3-6438-101B-ACC1-00AA00423326} failed with error 80040154.

Gravatar
This is because MAPI is 32 bit only, and explicitly unsupported when called from .NET.

It will not, ever, work in 64 bit mode.

We had to write a seperate worker app in C++ to get it stable enough for commercial use, so if you are only working with Ex2007, I strongly suggest you look t the web services, NOT MAPI - it's a dog, impossible to debug and maintain once it gets complex, and microsoft will NOT support it - even if you pay - if you are calling it from .NET.

:)

Oh yeah, you mantra: close you handles ;-) tho generally, you can't force them closed in .NET, which is part of the problem. Expect to cycle the process often :)
Posted by Nic Wise on 9/17/2007 3:02 PM

# re: Error: CLSID {3FA7DEB3-6438-101B-ACC1-00AA00423326} failed with error 80040154.


mate, this post saved my life!! building an app calling 3rd partie lib's on a vista 64 ult + vs 2005 and kept breaking with that error.

i had to install a virtual pc with xp and build everytime on that!

thanks heaps.
Posted by lucas on 5/14/2008 10:26 PM

# re: Error: CLSID {3FA7DEB3-6438-101B-ACC1-00AA00423326} failed with error 80040154.

Gravatar
I have the same problem, but get resolved it with the comment.
Posted by Fabricio Gomes on 6/9/2009 1:57 AM

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