I'm getting the following error when trying to run my asp.net website in a browser:

HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.

Module IIS Web Core

Notification Unknown

Handler Not yet determined

Error Code 0x8007000d

Config Error

Config File \?\C:\inetpub\vhosts\======\httpdocs\web.config

Requested URL http://======:80/index.aspx

Physical Path

Logon Method Not yet determined

Logon User Not yet determined

(==== to hide sensitive data)

Config Source


Why am I getting this error? Other sites on the same server are working fine. Thanks!

2 Answers 2


It seems to be indicating that the configuration file has problems; does the file exist? are its contents valid?

  • I thought this, I checked the web.config file. Everything seems fine.. :S
    – Curtis
    Nov 2, 2010 at 15:55
  • I wonder if you've edited or even just opened the config file in a different editor; perhaps it's ANSI encoded, for example? (straws being grasped!) Nov 2, 2010 at 19:03
  • Looks like it might have been an issue with the web.config. I've replaced it with an entirely new one after many attempts at trying to locate the bug, and now the sites working fine. Thanks Andrew
    – Curtis
    Nov 3, 2010 at 9:19

Since this is a bit strange, I will start with Failed Request Tracing. I will enable tracing for Status code: "200 - 999". I will see at what state will IIS Web Core fail. There has to be some issue with the config file which is giving this incomplete error.

You can check Troubleshooting HTTP 500.19 Errors in IIS 7 for more guidance.

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