We have a historic DNN solution with a few custom modules that was running on v7.3.4.

We've upgraded it in line with the documentation > v7.3.4 > v8.0.3 > v8.0.4.226 > v9.0.0.1002 > v9.0.1.142 > v9.0.2 > v9.1.0.367 > v9.1.1.129-232

Since upgrading we are presented with an error message when on a page containing one of our module:

Server Error in '/' Application.

Cannot unregister UpdatePanel with ID 'DocMap' since it was not registered with the ScriptManager. This might occur if the UpdatePanel was removed from the control tree and later added again, which is not supported.

Parameter name: updatePanel

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: Cannot unregister UpdatePanel with ID 'DocMap' since it was not registered with the ScriptManager. This might occur if the UpdatePanel was removed from the control tree and later added again, which is not supported.

Parameter name: updatePanel

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: Cannot unregister UpdatePanel with ID 'DocMap' since it was not registered with the ScriptManager. This might occur if the UpdatePanel was removed from the control tree and later added again, which is not supported.

Parameter name: updatePanel]

   System.Web.UI.PageRequestManager.UnregisterUpdatePanel(UpdatePanel updatePanel) +222

   System.Web.UI.UpdatePanel.OnUnload(EventArgs e) +121

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +141

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Control.UnloadRecursive(Boolean dispose) +355

   System.Web.UI.Page.UnloadRecursive(Boolean dispose) +24

   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +12361809

   System.Web.UI.Page.ProcessRequest() +119

   System.Web.UI.Page.ProcessRequest(HttpContext context) +99

   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +913

   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +165

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.36415

Checking online indicates - http://www.dnnsoftware.com/forums/threadid/539307/scope/posts/problems-by-using-of-updatepanel-in-dnn9

Directing you to register the UpdatePanel with ScriptManager prior to it unloading it:

protected void UpdatePanel_Unload(object sender, EventArgs e) {
    MethodInfo methodInfo = typeof(ScriptManager).GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
        .Where(i => i.Name.Equals("System.Web.UI.IScriptManagerInternal.RegisterUpdatePanel")).First();
    methodInfo.Invoke(ScriptManager.GetCurrent(Page),
        new object[] { sender as UpdatePanel });
}

How ever this would require changing the DNN source files and building the solution myself which doesn't seem the correct approach to take considering that this change would need to be edited into each new revision of the DNN framework.

 

Has anyone experienced this issue themselves? If so how did you correct it?

Progress! Unfortunately it wasn't as easy as changing the HTML editor.
I've narrowed down the issue to the inclusion of the following on a control:
ID="ReportViewer1"
runat="server"
ProcessingMode="Remote"
height="100%"
Width="100%"
SizeToReportContent="true"
BackColor="White"
InternalBorderStyle="Solid">


If I comment out all the C# code and just leave the above it still produces the error when any page including the module is loaded.
I'm going to try updating the .dll files to the 2016 and see if that alleviates the issue.

Unfortunately the updated ReportViewer did not correct the issue.
I have tried adding removing the ReportViewer from the page and adding an iFrame to the bbc website, this worked correctly.
I have updated the src of the iFrame to point directly to the report URL and again this produces the same error message when trying to edit the page in admin mode.