Fatal Execution Engine Error (79FFEE24) (80131506)

Question

I\'m encountering problems with my .NET Framework 3.0 SP1 application. It is a C# winforms application communicating with a COM exe. Randomly either the winforms app or the

Answer 1

Microsoft released a hotfix

https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=16827&wa=wsignin1.0

Answer 2

It can be a whole lot of things. Some people repair .NET Framework 3.5, others reinstall .NET alltogether. Some say it's something with PowerCommands, etc. etc. If all else has failed, try what worked for me:
- start VS up in safe mode
- create a new Windows Forms application
- open your toolbox and delete any special tabs (for me, it was a SQLite tab) - close and restart in normal mode

If this doesn't work, good luck!

Answer 3

I had this error, it (luckily) went away by installing 3.5 SP1, which bumps your runtime to version 2.0.50727.3053 (this is a nice version summary).

While hunting for solutions I found a wild range of suspects for this error. Some people even claimed it was the antivirus (!)

YMMV, good luck.

Answer 4

I had an issue on vs 2008 sp1 with asp.net mvc rc1 where opening aspx pages crashed visual studio.

The work around for me is to re-open the solution/project after crash, set project | show all files, and delete the mvc refs for system.web.mvc, system.web.abstractions, and system.web.routing. Then I am able to open the files.

The problem returns later, but I am able to follow the above and I am able to open aspx files afterwards.

Thanks

Eric

Answer 5

These seem to be mainly caused by a bad install of the framework. See if you can repro the error on another machine, or uninstall/reinstall the Framework bits.

Answer 6

The hotfix above worked for me!

The described problem occured when opening any *.aspx page in VS in my ASP.NET MVC (RC1) project.