Hello.

It should be said that "subscribe to all nodes in the UA server" is, in a general case, a discouraged practice. The address space can be large up to being infinite, and subscribing to it requires browsing the nodes first, which can therefore take very long time. Also, I assume that the requirement isn't really "subscribe to all nodes" - because there are many nodes that make little sense for subscriptions (such as nodes in that define types). So the "probable" requirement is actually "all variables".

I admit that in a special case, such as when you know your target UA server and how its configuration(s) look like (and that they are reasonably constrained), this approach might be the way to go.

What you need to do is to combine the example you have already found, with this one: softwaretoolbox.doc-that.com/files/onlinedocs/OpcDataClient/...ata%20nodes%20recursively.html .

The "BrowseFromNode" method would, instead of displaying the nodes, add them to a list. After the calls finish, the assembled list can be used as bassi for making the subscriptions.

I hope this helps