Check Server for Node Changes|OPC UA Implementation: Stacks, Tools, and Samples|Forum|OPC Foundation

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Check Server for Node Changes
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John Curry
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12/26/2020 - 09:26
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Is there a way my Client can get notified if the Server address space has been modified (Add/Delete/Modify node)?  

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Randy Armstrong
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John Curry
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01/11/2021 - 07:42
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So it looks like ModelChangeEvents  is the event that will tell me if the address space is changed.  Is there sample code somewhere that shows me how to subscribe to an event, and get notification when the event happens?  Thx

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Randy Armstrong
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01/12/2021 - 11:39
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Note that ModelChange events are only produced when the "Version" property is attached to a Node.

Many servers will not report these events and there is no other mechanism.

Sample code:

https://github.com/OPCFoundati.....mpleEvents

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