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DevNames property node return disconnected network DAQ

When I used the DevNames property node to query the connected devices with my machine, it returns the disconnected ENET devices also.  This is not what I expected.  As the attached picture shows, I don't expect it returns "ENET-1450FB1" since it is displayed as disconnected in MAX.

 

Is it a bug?  Can I have a workaround?   Currently I use the Self-Test Device VI to confirm whether the ENET devices are really connected.  But I don't like this workaround because it takes so much time to wait until the VI is timeout.  

 

Thanks 

 

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