ConstraintException
  Column 'value' is constrained to be unique.  Value 'BBS.Biz.Base.AuditBO' is already present.
Source     : System.Data
Stack Trace: 
   at System.Data.UniqueConstraint.CheckConstraint(DataRow row, DataRowAction action)
   at System.Data.DataTable.RaiseRowChanging(DataRowChangeEventArgs args, DataRow eRow, DataRowAction eAction, Boolean fireEvent)
   at System.Data.DataTable.SetNewRecordWorker(DataRow row, Int32 proposedRecord, DataRowAction action, Boolean isInMerge, Int32 position, Boolean fireEvent, Exception& deferredException)
   at System.Data.DataTable.InsertRow(DataRow row, Int32 proposedID, Int32 pos, Boolean fireEvent)
   at System.Data.DataRowCollection.Add(DataRow row)
   at MicroFour.StrataFrame.Extensibility.ListPopulationEditorDialog.ᜂ()
   at MicroFour.StrataFrame.Extensibility.ListPopulationEditorDialog.ᜁ(Object A_0, EventArgs A_1)

After I close the error message, the SF dialog is there, but with no Business Objects or methods to choose from.  Can someone please advise on what might be causing this error? Thanks in advance.

We actually rely on the DTE to give us the references.  We search through the projects within the solution.  Then for each project, we query the references and search for classes that are a subclass (at some heirarchal point) of BusinessLayer.  I am willing to bet that you have a reference issue somewhere.  That would be my first inclinication.

I know how you feel in regards to this though...sometimes .NET can hang onto things and it may end up being a simple fix in the end, but there are not any messages to clue you in!