I have a form with a ParentBO and 3 children (I´m using DevExpress grid with BBS).
When I try to delete the record by Form, appears this message below.

I´ve been looking for some configurations on my BOParent or Form and .. Nothing....
This occurs when BoChildren are filled or not.

Some help guys?

--------------------------------------------------------------------------------------------------------
NullReferenceException
  Object reference not set to an instance of an object.

Source     : MicroFour StrataFrame Business

Stack Trace:
   at MicroFour.StrataFrame.Business.BusinessLayer.DeleteChildRecords(Boolean OnlyMarkAsDeleted)
   at MicroFour.StrataFrame.Business.BusinessLayer.DeleteCurrentRow(Boolean CheckSecurity, Boolean OnlyMarkAsDeleted)
   at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.Delete(Boolean OnlyMarkAsDeleted, Boolean CheckSecurity)
   at MicroFour.StrataFrame.UI.Windows.Forms.MaintenanceFormToolStrip.cmdDelete_Click(Object sender, EventArgs e)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)
   at System.Windows.Forms.Nativewindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
--------------------------------------------------------------------------------------------------------