Server Error in '/' Application.

Only one instance of a ScriptManager can be added to the page.

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.InvalidOperationException: Only one instance of a ScriptManager can be added to the page.

Source Error:


Line 63:         mRadScriptManager.EnableScriptCombine = true;
Line 64: 
Line 65:         this.Controls.Add(mRadScriptManager);
Line 66:         this.Page.Form.Controls.Add(mRadScriptManager);
Line 67: 

Source File: e:\New Web\New Website\Website333\BSUWebsite\BSU\BSUWebSite\App_Code\AbstractMasterPageBase.cs    Line: 65

Stack Trace:


[InvalidOperationException: Only one instance of a ScriptManager can be added to the page.]
   System.Web.UI.ScriptManager.OnInit(EventArgs e) +587082
   System.Web.UI.Control.InitRecursive(Control namingContainer) +166
   System.Web.UI.Control.AddedControl(Control control, Int32 index) +214
   AbstractMasterPageBase.InitAbstractClassWebControls() in e:\New Web\New Website\Website333\BSUWebsite\BSU\BSUWebSite\App_Code\AbstractMasterPageBase.cs:65
   AbstractMasterPageBase.Page_Init(Object sender, EventArgs e) in e:\New Web\New Website\Website333\BSUWebsite\BSU\BSUWebSite\App_Code\AbstractMasterPageBase.cs:38
   System.Web.UI.Control.OnInit(EventArgs e) +106
   System.Web.UI.Control.InitRecursive(Control namingContainer) +166
   System.Web.UI.Control.InitRecursive(Control namingContainer) +370
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1598


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3429.0