If you do not get any error, but just an empty list, this means that the LDS-ME is not returning any servers to us and that's beyond our concern.

Unless, of course, you have some other OPC client that uses FindServersOnNetwork to connect to LDS-ME and DOES return some servers - which would then require investigation as to why QuickOPC's result are different.

But in general, for LDS-ME to return servers:
- The servers running on the same machine as the LDS-ME need to be configured to register with LDS-ME - which normally also includes configuring the UA security for them because registering the server with LDS-ME is security sensitive.
- If there are other LDS-ME servers on the network, the network must allow the proper mDNS (UDP) traffic between them.
- Servers on other machines need to be configured to register with their respective LDS-ME servers on those machines.

Best regards

For any real application, it MUST be something else. Real application is not interested in servers on our demo network.

It must be the name of the host where you/the customer have installed the LDS-ME server.

It can be "localhost" if the LDS-ME is on the same computer as the client, or some other host name.
This is where the DiscoverNetworkServers methods gets the information from.

Best regards

Not sure what other servers you wants to see. These are servers on our demo network, so it is up to us who decide which servers gets listed. If you are referring to the fact that we also have a GDS demo server, then this one is not probably properly registering itself with LDS-ME due to an omission in the configuration, but that does not have any negative impact on the purpose of the demo apps and the examples that use them.

Bets regards

As a first argument, you need to pass in the host name of the machine that runs the LDS-ME. "opcua.demo-this.com" is used in our examples, as it is the host name where we run our demo LDS-ME.

Yes.

- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...0UA%20Network%20Discovery.html

- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...0UA%20Network%20Discovery.html

Best regards