Hello, the statusCode OpcUA_BadCommunicationError normally occurs, when the connection fails at all. If you want to connect to OPC UA Server on virtual ctrlX from another network host there are many things you should keep in mind (e.g. Port Forwarding, Firewall), since the virtual ctrlX is running in a virtual machine. The usual configuration which works is: Configure Port Forwarding for virtual ctrlX. Please make sure to forwarding port 4840 (By configuring 4840:4840) Configure our Firewall (e.g. Windows Defender Firewall with Advanced Security) an incoming rule (Inbound Rules), which allows network traffic for tcp port 4840 After the 2 steps you should get at least a connection. Of course other issues can occurs, but you will get another StatusCode, which can help you to slove the issue.
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