Change Topology without Closing Reference

[GSinMN]

Hello All,

 Wondering if I should be able to change the topology of a MUX (reinitialize) without closing the reference?  I have a application that loops through the basic initialize, connect, disconnect sequence for the NI-Switch functions, and the topology changes for each loop.  I think my reference is getting lost, because it becomes invalid after several loops.  Do I need to close the reference before I reinitialize with the new topology?  I would prefer to not have to close it every time, because I have "cleanup" steps that close all of the references outside of the loop. Working with PXI-2527, LV 2013 and TS 2013.  Thanks in advance.

GSinMN    

[LindyHop · Accepted solution]

Hekki GSinMN,

This KnowledgeBase Article should answer your question. The last line reads, "When changing the topology, you have to close the present session if one is open, and reinitialize the card with the new DriverSetup selected."

[GSinMN]

Thanks for the response Jonathan.  I suspected as much.  So this means I will need to change my cleanup to account for sessions that have already been closed.  So how can I tell if a session is still open/valid, before I try to close it?  I've tried by checking to see if the session number is "0", but that doesn't seem to work every time.  (I think this is a TestStand question, so I will post it there as well).  Thanks again. 

GSinMN