When Migrate from ASP.NET 1.1 to 2.0 and try to run the application, the following error may come:

Is not a valid Win32 application. (Exception from HRESULT: 0×800700C1)

Possible Solution


1. change the IIS on the x64 bit machine to run 32 bit mode .Net 2.0.

2.

a. Goto IIS and click on Application Pools.

b. Select the Application Pool that is configured for your web application in the list.

3. Click on Advanced Settings on the right.

4. Enable 32-Bit Applications - must be set to True.

Reference: http://forums.asp.net/t/983377.aspx

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