Exception from HRESULT: 0x80131047

Question

I am having this problem whenever I try to debug my project:

It's in French, here is my translation:

"Error while trying to run project: Failed Loading assembly "DBZ buu's Fury Text Editor" or one of it's dependencies. The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)"

Can anyone help me please?

Answer 1

If you are using Assembly.Load() to load file try to change it with Assembly.LoadFile() instead.

Answer 2

Project > Project Properties > Name > remove the apostrophe ("'") from the name, and it will work.

Answer 3

It may not necessarily be related to that as in my case...

First, I would like to say that this was a very hard issue troubleshoot as there may be many variables leading to the actual problem related to assemblies.

So I was working on an Outlook Add-In 2010 targeting the 32-bit version of Office. Everything was working fine until one day out of the blues, the add-in wouldn't load anymore and I was presented with error "HRESULT: 0x80131047". After searching almost half a day I found a nice article:

http://blogs.msdn.com/b/astebner/archive/2007/05/06/2457576.aspx

I tried adding the assembly to the global cache but was unable to. Luckily, I had an almost identical project which ran just fine and I had already done comparison checks and everything seemed the same, but on this pass I found something different ... as it turned out the platform target CPU was set to 64-bit so I changed it to "Any" and voila'! - this fixed it!

Answer 4

I had an invalid .\Properties\licences.licx file that was causing this problem. This file is automatically generated by DevExpress components.

I just deleted this file and voila: Build Succeeded.

Answer 5

This MSDN forum post says that you need to take "special" characters such as slashes, commas, or apostrophes out of your assembly name to avoid that error.

If that doesn't fix it, another suggestion there is to uncheck "Enable the Visual Studio Hosting Process" in the Debug tab.