Value cannot be null. at Microsoft.SharePointLearningKit.DropBoxManager.LastSubmittedFiles(SPUser user)

Topics: Developer Forum
Sep 2, 2010 at 2:35 PM

When I click Assignment link in instruction mode, I get the following error in SharePoint:

Value cannot be null. at Microsoft.SharePointLearningKit.DropBoxManager.LastSubmittedFiles(SPUser user)
   at Microsoft.SharePointLearningKit.DropBoxManager.LastSubmittedFiles(Int64 learnerId)
   at Microsoft.SharePointLearningKit.WebControls.GradingList.RenderGradedLearner(GradingItem item, HtmlTextWriter htmlTextWriter)
   at Microsoft.SharePointLearningKit.WebControls.GradingList.RenderGradingItem(GradingItem item, HtmlTextWriter htmlTextWriter)
   at Microsoft.SharePointLearningKit.WebControls.GradingList.Render(HtmlTextWriter writer)
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer)
   at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer)
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer)
   at System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output)
   at System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer)
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer)
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Page.Render(HtmlTextWriter writer)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

 

Please, could someone help?
Best regards