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Editorial Team
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Asked: 2026-05-14T21:51:39+00:00

I keep getting this error ever so often when I launch the debugger to

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I keep getting this error ever so often when I launch the debugger to debug my site. I’m using the Telerik controls, and usually the error is in my tab strip. Here is an example of the error I’m looking at right now:

Compiler Error Message: CS0433: The type 'ASP.controls_motorvehiclegeneral_ascx' exists in both 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_6wlqh1iy.dll' and 'c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_ro_sgchs.dll'

Source Error:

Line 48:     </telerik:RadTabStrip>
Line 49:     <telerik:RadMultiPage ID="RadMultiPageControls" Runat="server" SelectedIndex="0">
Line 50:     <telerik:RadPageView ID="PageGeneral" runat="server"><uc1:General ID="GeneralControl" runat="server" /></telerik:RadPageView>
Line 51:     <telerik:RadPageView ID="PageVehicle" runat="server"><uc1:VehicleList ID="VehicleList" runat="server" /></telerik:RadPageView>
Line 52:     <telerik:RadPageView ID="PagePerson" runat="server"><uc1:PersonList ID="PersonList" runat="server" /></telerik:RadPageView>

The thing that bothers me most, is if I just keep hitting F5, the page WILL refresh and work as it should. Sometimes it takes several refreshes to do this, others it happens pretty quick. I have not been able to find a solution on the net, as most of the people with this error are upgrading from VS2005 to Web Application, and thus the fix seems to be “Remove your app_code directory, and change the CodeFile= to CodeBehind=. But, the CodeBehind is old, and not used anymore.

In this instance, I’m getting the error on my General tab, but it can happen of ANY of my user controls when it DOES happen.

Has anyone else seen this with pre-compiled pages? I’m using VS2008 SP1.

The other effect I’ve seen related to this is when I have a GridView setup with a datasource, and the datasource changes, but the page does not update until several other operations, then all at once all the data is filled in… This makes me think there is some sort of cache issue, or compile-time, time-out or something…

I am using a site.master page, and have checked the @Page and @Master directives… Just for the sake of argument, here are the compiler options it’s using…

C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE> "c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\csc.exe" /t:library /utf8output /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\6614ff9a\005164fc_423cc801\PetersDatePackage.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.IdentityModel\3.0.0.0__b77a5c561934e089\System.IdentityModel.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\Microsoft.ReportViewer.Common\9.0.0.0__b03f5f7f11d50a3a\Microsoft.ReportViewer.Common.dll" /R:"C:\WINDOWS\assembly\GAC_32\System.EnterpriseServices\2.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_0-em44qa.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_6wlqh1iy.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_ro_sgchs.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\Microsoft.Build.Utilities\2.0.0.0__b03f5f7f11d50a3a\Microsoft.Build.Utilities.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.ServiceModel\3.0.0.0__b77a5c561934e089\System.ServiceModel.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\6fe979bb\0056bc44_4b94c701\Microsoft.Practices.EnterpriseLibrary.Common.DLL" /R:"C:\WINDOWS\assembly\GAC_32\System.Web\2.0.0.0__b03f5f7f11d50a3a\System.Web.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\ad70f8ed\0010f920_4b94c701\Microsoft.Practices.EnterpriseLibrary.Data.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.ServiceModel.Web\3.5.0.0__31bf3856ad364e35\System.ServiceModel.Web.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\d61e8194\009ae0bd_854ec901\Telerik.Web.UI.DLL" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\98ba2ae7\211fb135_e674c901\CoreAPI.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Web.Extensions\1.0.61025.0__31bf3856ad364e35\System.Web.Extensions.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Management\2.0.0.0__b03f5f7f11d50a3a\System.Management.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\62fa267e\9888875e_bb5cc901\AjaxControlToolkit.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\Microsoft.Build.Framework\2.0.0.0__b03f5f7f11d50a3a\Microsoft.Build.Framework.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Drawing\2.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Code.nufffrfb.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Web.Services\2.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\52f6447d\f90fd1c8_b475c901\StatisticsAPI.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\System\2.0.0.0__b77a5c561934e089\System.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\955f38e7\982cdc0f_bc5cc901\Validators.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\Microsoft.ReportViewer.WebForms\9.0.0.0__b03f5f7f11d50a3a\Microsoft.ReportViewer.WebForms.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Runtime.Serialization\3.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_nv7t8gs_.dll" /R:"C:\WINDOWS\assembly\GAC_32\System.Data\2.0.0.0__b77a5c561934e089\System.Data.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Configuration\2.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Design\2.0.0.0__b03f5f7f11d50a3a\System.Design.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.WorkflowServices\3.5.0.0__31bf3856ad364e35\System.WorkflowServices.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Web.Mobile\2.0.0.0__b03f5f7f11d50a3a\System.Web.Mobile.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\assembly\dl3\a5daf5e0\0071b5e7_909cc701\Microsoft.Practices.ObjectBuilder.DLL" /R:"C:\WINDOWS\assembly\GAC_MSIL\Microsoft.ReportViewer.ProcessingObjectModel\9.0.0.0__b03f5f7f11d50a3a\Microsoft.ReportViewer.ProcessingObjectModel.dll" /R:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_atcckswk.dll" /R:"C:\WINDOWS\assembly\GAC_MSIL\System.Xml\2.0.0.0__b77a5c561934e089\System.Xml.dll" /out:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_zva2jsmk.dll" /D:DEBUG /debug+ /optimize- /win32res:"c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\zva2jsmk.res" /nowarn:1659;1699;1701 /d:DBCONVERTPUBLIC;CRYSTALSUPPORT  "c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_zva2jsmk.0.cs" "c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_zva2jsmk.1.cs" "c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\statisticsweb\30c716d3\eebad209\App_Web_zva2jsmk.2.cs"

Anyone have any ideas where I can even start to look?

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1 Answer

  1. Editorial Team

    killing Cassini instances as above didn’t work for me.
    ScottGu posted about this issue

    setting the batch=”false” attribute on the compilation section in web.config worked for me.

    <configuration>

   <system.web>
       <compilation debug="false" batch="false"></compilation>
   </system.web>

</configuration>

    This tells ASP.NET to dynamically
    compile individual .aspx/.ascx files
    into separate assemblies. This avoids
    the circular reference issue that
    triggers the exception.

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