Server Error in '/' Application.

The virtual path 'null' maps to another application, which is not allowed.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: The virtual path 'null' maps to another application, which is not allowed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentException: The virtual path 'null' maps to another application, which is not allowed.]
   System.Web.CachedPathData.GetVirtualPathData(VirtualPath virtualPath, Boolean permitPathsOutsideApp) +9786217
   System.Web.HttpContext.GetFilePathData() +36
   System.Web.HttpContext.GetConfigurationPathData() +26
   System.Web.Configuration.RuntimeConfig.GetConfig(HttpContext context) +43
   System.Web.Configuration.CustomErrorsSection.GetSettings(HttpContext context, Boolean canThrow) +46
   System.Web.HttpResponse.ReportRuntimeError(Exception e, Boolean canThrow, Boolean localExecute) +99
   System.Web.HttpContext.ReportRuntimeErrorIfExists(RequestNotificationStatus& status) +305


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.36480