Unspecified error (MS Visual Database Tools)

Hi all.
 
I am receiving this message.
Anyone can explain me what is going on, please?
 
Unspecified error  (MS Visual Database Tools) ------------------------------ Program Location:    at Microsoft.VisualStudio.DataTools.Interop.IDTTableDesignerFactory.NewTable(Object dsRef, Object pServiceProvider)    at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.TableDesignerNode.CreateDesigner(IDTDocToolFactoryProvider factoryProvider, IVsDataConnection dataConnection)    at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VsDataDesignerNode.CreateDesigner()    at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VsDataDesignerNode.Open()    at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VirtualProject.Microsoft.SqlServer.Management.UI.VSIntegration.Editors.ISqlVirtualProject.CreateDesigner(Ur ...