identify by their physical port number com ports programmatically

I have a system with an NI PXI-8420/16 card.  From time to time a small problem in my PXI system occurs such as my RS-232 physical ports are assigned to different COM port numbers  So, I have to go to MAX and reassign my alias to realign my LabVIEW application with my port hardware.  Is there a way to stop these seeds from happenning?  OR is it possible to identify by program number of a physical port com?

See if this helps: http://forums.ni.com/ni/board/message?board.id=170&message.id=490257#M490257

Tags: NI Software

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