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OPC UA Clinet Fails to connect

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I have followed the OPC UA tutorial of National Instruments and managed to build my own server and simple client, no problem.

However, whenever I try to connect to a third party device that runs an OPC UA server, i either get an error that "the certificate is not trusted" or "status of server unknown".

 

In the simple Labview client version i have tried to set "trust all servers" to true, still i get the not trusted error message. I also tried downloading the server certificate and providing it in the "trusted certificates" feed, but still i cannot connect.

 

I can connect to the OPC UA server with other software, absolutely no problem. This is why i am asking, how hard can it be? What could be going wrong?

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