Hi,

In the process of making major changes to a web form, I renamed the original 'DataDictDownload' to 'DataDictDownload_old'.

I then backed-up 'DataDictDownload_old' to another folder and deleted it from the app folder - now when I run 'DataDictDownload', whenever I try to postback to the server (i.e. when clicking a command button), I get the following error:

[NullReferenceException: Object reference not set to an instance of an object.]
   LuckyDogSystems.DataDictDownload.fnValidateInput()
   LuckyDogSystems.DataDictDownload.cmdDownload_Click(Object sender, EventArgs e)
   System.Web.UI.WebControls.Button.OnClick(EventArgs e)
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
   System.Web.UI.Page.ProcessRequestMain()

In fact, I even added a new commandbutton with one line of code - simply setting the visible property of a label to false. I received the same error on clicking this new button ...

I can't figure it out, because I do have the '.aspx', '.aspx.resx' and '.aspx.vb' files in place. Any ideas where the problem may be?