NullReference exception when inserting rows/columns

I''m trying to insert some rows into my grid and I''m getting the following exception thrown: System.NullReferenceException: Object reference not set to an instance of an object. at Syncfusion.Windows.Forms.Grid.GridFormulaEngine.AdjustReferencesForRangeChange(GridModel grd, Boolean isCols, Boolean isInsert, Int32 start, Int32 end) at Syncfusion.Windows.Forms.Grid.GridFormulaCellModel.GridRowsInserted(Object sender, GridRangeInsertedEventArgs e) at Syncfusion.Windows.Forms.Grid.GridRangeInsertedEventHandler.Invoke(Object sender, GridRangeInsertedEventArgs e) at Syncfusion.Windows.Forms.Grid.GridModel.OnRowsInserted(GridRangeInsertedEventArgs e) at Syncfusion.Windows.Forms.Grid.GridModel.RaiseRowsInserted(GridRangeInsertedEventArgs e) at Syncfusion.Windows.Forms.Grid.GridModelRowOperations.OnRangeInserted(GridRangeInsertedEventArgs e) I have the formulacopyflags set to update on row insertions/deletions. I am doing the insertions from inside a begin/end update if that helps. Any ideas on how I solve this? Thanks.