asp.net - HttpError iis config throws exception when default path is added

Question

I have this config which works and redirects the following errors correctly

<httpErrors errorMode="Custom" 
        existingResponse="Replace" 
        defaultResponseMode="ExecuteURL" >
  <remove statusCode="403" />
  <remove statusCode="404" />
  <remove statusCode="500" />
  <error statusCode="403" responseMode="ExecuteURL" path="/Error/AccessDenied" />
  <error statusCode="404" responseMode="ExecuteURL" path="/Error/PageNotFound" />
  <error statusCode="500" responseMode="ExecuteURL" path="/Error/ApplicationError" />
</httpErrors>

But when I add the following default path to try to add a catch all

<httpErrors errorMode="Custom" 
        existingResponse="Replace" 
        defaultResponseMode="ExecuteURL" 
        defaultPath="/Error/ApplicationError">

The server throws a web.config error

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

Now this directly contradicts the documentation on msdn

Any help would be greatly appreciated!!

Answer 1

Using of defaultPath attribute prevents using of path attribute in your error nodes. So below configuration will work (but of course it will show the same error page for all HTTP errors defined here):

<httpErrors errorMode="Custom" existingResponse="Replace"
  defaultResponseMode="ExecuteURL" defaultPath="/Error/ApplicationError">
  <remove statusCode="403" />
  <remove statusCode="404" />
  <remove statusCode="500" />
  <error statusCode="403" responseMode="ExecuteURL" />
  <error statusCode="404" responseMode="ExecuteURL" />
  <error statusCode="500" responseMode="ExecuteURL" />
</httpErrors>

Related doc: https://msdn.microsoft.com/en-us/library/ms690576(v=vs.90).aspx