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                                          Error: Exception of type 'System.Web.HttpUnhandledException' was thrown.
                                          System.NullReferenceException: Object reference not set to an instance of an object.
   at Portal3DPrinterVS.Applications.OnSite.ItemDetails.getitems(String cat, String id) in D:\3DHubApp\App\SC\Portal3DPrinterVS\Portal3DPrinterVS\Applications\OnSite\ItemDetails.aspx.cs:line 40
   at Portal3DPrinterVS.Applications.OnSite.ItemDetails.Page_Load(Object sender, EventArgs e) in D:\3DHubApp\App\SC\Portal3DPrinterVS\Portal3DPrinterVS\Applications\OnSite\ItemDetails.aspx.cs:line 17
   at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)