Hi,

We are getting this error when going into a section in uCommerce, the other sections seem to work fine.

Server Error in '/' Application.
Sequence contains more than one matching elementDescription: 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.InvalidOperationException: Sequence contains more than one matching element

Source Error: 

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.

Stack Trace: 

[InvalidOperationException: Sequence contains more than one matching element]
   System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source, Func`2 predicate) +2716738
   UCommerce.EntitiesV2.Product.GetPrice(PriceGroup priceGroup) +81
   UCommerce.Catalog.PricingService.GetProductPrice(Product product, PriceGroup priceGroup) +38
   UCommerce.Catalog.PricingService.GetProductPrice(Product product, ProductCatalog catalog) +30
   UCommerceWeb.Umbraco.UCommerce.Catalog.<>c__DisplayClass1.<DataBind>b__0(Product product) +286
   System.Linq.WhereSelectListIterator`2.MoveNext() +110
   System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource) +507
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +61
   System.Web.UI.WebControls.Repeater.DataBind() +76
   UCommerceWeb.Umbraco.UCommerce.Catalog.EditCategoryProducts.DataBind() +916
   System.Web.UI.Control.DataBindChildren() +201
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +101
   System.Web.UI.Control.DataBind() +15
   System.Web.UI.Control.DataBindChildren() +201
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +101
   System.Web.UI.Control.DataBind() +15
   UCommerce.Presentation.Web.Umbraco.TabViewBuilder.BuildTabView(TabView tabView, IView view, Boolean databindTabView, ImageClickEventHandler saveMethod, ImageClickEventHandler deleteMethod) +556
   UCommerceWeb.Umbraco.UCommerce.Catalog.EditCategory.InitializeTabView(TabView tabView) +78
   UCommerceWeb.Umbraco.UCommerce.MasterPages.UmbracoTabView.Page_Load(Object sender, EventArgs e) +64
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Control.LoadRecursive() +146
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207








Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272

From umbracoLog table:

At /umbraco/ucommerce/catalog/editcategory.aspx?id=115 (Referred by: http://www.website.com/umbraco/umbraco.aspx): System.InvalidOperationException: Sequence contains more than one matching element
   at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at UCommerce.EntitiesV2.Product.GetPrice(PriceGroup priceGroup)
   at UCommerce.Catalog.PricingService.GetProductPrice(Product product, PriceGroup priceGroup)
   at UCommerce.Catalog.PricingService.GetProductPrice(Product product, ProductCatalog catalog)
   at UCommerceWeb.Umbraco.UCommerce.Catalog.EditCategoryProducts.<>c__DisplayClass1.<DataBind>b__0(Product product)
   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
   at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource)
   at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e)
   at System.Web.UI.WebControls.Repeater.DataBind()
   at UCommerceWeb.Umbraco.UCommerce.Catalog.EditCategoryProducts.DataBind()
   at System.Web.UI.Control.DataBindChildren()
   at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding)
   at System.Web.UI.Control.DataBind()
   at System.Web.UI.Control.DataBindChildren()
   at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding)
   at System.Web.UI.Control.DataBind()
   at UCommerce.Presentation.Web.Umbraco.TabViewBuilder.BuildTabView(TabView tabView, IView view, Boolean databindTabView, ImageClickEventHandler saveMethod, ImageClickEventHandler deleteMethod)
   at UCommerceWeb.Umbraco.UCommerce.Catalog.EditCategory.InitializeTabView(TabView tabView)
   at UCommerceWeb.Umbraco.UCommerce.MasterPages.UmbracoTabView.Page_Load(Object sender, EventArgs e)
   at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
   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.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Any ideas?

Thanks

Chris