I am very new to DNN and am supporting a customized version of DNN. The site seems to be running a very early version of DNN (seems to be 2.1.2) in an environment with Visual Studio 2003, ASP.NET 1.1, IIS 5.1 on a virtual PC running Windows XP,. I am attempting to upgrade the application to run in Visual Studio 2010, ASP.NET v. 3.5, IIS 7 on a Windows 10 computer.
I receive the following errorwhile attempting to run the application.
I am wondering if a fix exists that does not require an upgrade of DNN.
Object reference not set to an instance of an object.
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.NullReferenceException: Object reference not set to an instance of an object.
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.
[NullReferenceException: Object reference not set to an instance of an object.]
System.Web.Util.StringUtil.GetStringHashCode(String s) +43
System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +63
System.Web.UI.WebControls.TextBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +46
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +506
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2625
Version Information: Microsoft .NET Framework Version:2.0.50727.8670; ASP.NET Version:2.0.50727.8670