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Variable Engine crashes when querying a tag that doen't exist with OPC client

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Hi!

I'm working on a system based on LV 2011 DSC.  The system is multi-node and uses Sahred Variables.

We have a node that has everything available in the system and we would like to use the embedded OPC server in the Variable Engine to grab everything in real-time and feed a corporate historian system.

It happened couple of time that querying a tag that was not defined in NI (example: typo when typing an address in the OPC client) caused some instability and made the node crash.  After a reboot, everything was ok.

Is there a way to prevent a supervisory system of making crash a production system?  Can we limit the OPC server to the defined tags in the library?

Thanks.

 

Francois


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