Is this a modified Module in your development machine?

Yes, it was working when I did the modification but I put it back to the way it was after I started getting this erros. But the error still happening.

History:
I added some code to redirect to a different page in the submit event just to test the code. That's it. It worked once and then I started seeing this error. The code is no longer there but nothing has changed. This is my first time working with this code.

Ric.

I generally do not support anybody using the source code in a development environment.

I have seen this problem on non DNN modules, and in general on many ASP.NET applicaions.

Google the specific problem. Reboot the Machine. Delete the module instance etc. Sometimes the files in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\XXXXX get corrupted and need to be deleted.

Try killing aspnet_wp.exe process.