We setup a Marketing Offer earlier today. Now when we try to edit it, we receive the error message below. Anyone have any thoughts on what is causing this, how to fix it, and/or how to prevent it in the future? Thanks!

Server Error in '/' Application.
Value cannot be null.
Parameter name: container
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.ArgumentNullException: Value cannot be null.
Parameter name: container

Source Error:

Line 13: SelectedProductsGridView.DataSource = actualProducts
Line 14: SelectedProductsGridView.DataKeyNames = New String() {"bvin"}
Line 15: SelectedProductsGridView.DataBind()
Line 16: End Sub
Line 17:


Source File: G:\WEBS\GolfandSkiWarehouse\GolfandSkiBV5\WWW\BVModules\Offers\Product(s)\Edit.ascx.vb Line: 15

Stack Trace:

[ArgumentNullException: Value cannot be null.
Parameter name: container]
System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +8660039
System.Web.UI.WebControls.GridView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +2178
System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +57
System.Web.UI.WebControls.GridView.PerformDataBinding(IEnumerable data) +14
System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +114
System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +31
System.Web.UI.WebControls.DataBoundControl.PerformSelect() +142
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
System.Web.UI.WebControls.GridView.DataBind() +4
BVModules_Offers_Product_s_Edit.BindSelectedProductsGrid(Collection`1 products) in G:\WEBS\GolfandSkiWarehouse\GolfandSkiBV5\WWW\BVModules\Offers\Product(s)\Edit.ascx.vb:15
BVModules_Offers_Product_s_Edit.Initialize() in G:\WEBS\GolfandSkiWarehouse\GolfandSkiBV5\WWW\BVModules\Offers\Product(s)\Edit.ascx.vb:58
BVSoftware.Bvc5.Core.Content.OfferTemplate.Initialize(Boolean force) +104
BVAdmin_Marketing_OffersEdit.LoadOfferEditor(Offer offer, Boolean force) in G:\WEBS\GolfandSkiWarehouse\GolfandSkiBV5\WWW\BVAdmin\Marketing\OffersEdit.aspx.vb:56
BVAdmin_Marketing_OffersEdit.Page_Load(Object sender, EventArgs e) in G:\WEBS\GolfandSkiWarehouse\GolfandSkiBV5\WWW\BVAdmin\Marketing\OffersEdit.aspx.vb:15
System.EventHandler.Invoke(Object sender, EventArgs e) +0
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627


Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082