Adding serverRuntime tag in webconfig cause 500.19 error

Question

I have just downloaded asp.net project from TFS on my another laptop and couldn't get it to run. I have narrowed down the issue and it is something to do with my webconfig setting and setting is

<serverRuntime uploadReadAheadSize="128000000" />

If I comment this setting error goes away but I am just wondering why I have to comment this out when it is working on my other laptop for same project.

Error I get upon adding the above mentioned tag is following .

Answer 1

To anyone experiencing this issue, here is what I did to solve this issue.

• Open command prompt as administrator.
• Navigate to your web app.
• Copy/paste:

%windir%\system32\inetsrv\appcmd.exe unlock config -section:system.webServer/serverRuntime

• Press enter.

If successful you'll see something like this:

Unlocked section
       system.webServer/serverRuntime" at configuration path "MACHINE/WEBROOT/APPHOST