Introduction
Did you ever come across this error message when trying to debug a Silverlight application with Internet Explorer 11 on a 64 bit OS like Windows 7 x64?
Maybe this tip can help you.
Background
The reason for this lies in a registry setting called TabProcGrowth.
TabProcGrowth = 0:
Tabs run in the same process as the manager process.
On 64 bit Windows, all tabs are running as 64 bit.
This is what Visual Studio is complaining about.
TabProcGrowth = 1:
Tabs run in a different process.
Using the Code
In order to allow debugging, you must set the following registry key to 1:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\TabProcGrowth
If this value does not exist, you must create it yourself. Make sure it is a DWORD (32-bit value).
Don't forget to restart your Internet Explorer.
