Here's the sequence of events that causes the problems:

AutoEmptyOnParentAdded = true (I've tried this with other child objects and it's consistent)

When ParentBizObj.NewRow() is called, the execution path includes:

mmBusinessObjectGeneric.StateChangeHandler(mmBaseBusinessObject bizObj, mmBusinessStateChangeEventArgs e)
When AutoEmptyOnParentAdded = true, GetEmptyEntityList() is called.

BusinessObjectHelperDS.GetEmptyEntityList[EntityType](string databaseKey, mmBusinessObjectGeneric[EntityType] businessObject)
When it calls GetEmptyDataSet(), it passes null for the dataset instead of the businessobject.DataSet - probably a very good reason.

mmBusinessObject.GetEmptyDataSet(DataSet ds, string tableName, string databaseKey)
When a null dataset is passed, the following code executes

ds = this.CreateDataSet();
this.SetCurrentDataSet(ds, tableName);

Thus, SetCurrentDataSet() is called without any DataTables defined. Later in GetEmptyDataSet(), GetEmptyDataTable() is called to create the DataTable, THEN SetCurrentDataSet() is called with a defined DataTable. It looks like the first call to SetCurrentDataSet() is an error and should be removed. I may be wrong (wouldn't be the first time, you can ask Kevin), but I don't see any scenarios where SetCurrentDataSet() belongs here.

mmBusinessObject.SetCurrentDataSet(DataSet ds, string tableName, bool setRequiredFields, bool raiseEvents, int rowNumber)
Executes and attempts to call CallStateChange() which calls...

mmBindingStrategyDataGrid.BindData(ImmBindingDataGrid mmGrid, DataSet ds, string tableName, mmBusinessObject bizObj)
which throws an error when setting the GridView.DataMember = tableName which is a table that does not exist in the dataset.



Answers to your questions:

I'm using WinForms.

oSalesDocument refers to a business object that is a composite of several business objects. The goal was to create a Business Document that contained the invoice, invoice items, customer... and all related information so I could combine the Business Logic to deal with a business document in one place. oSalesDocument.Invoices references the Invoices business object of the sales document.