I am not sure if this is a bug or not. But I struggled some with the following:
If you are using a remote tag provider and would like to have
*[remProv]tag01 OPC tag to “read using Polled”
*[remProv]tag2 OPC changes.
Meaning that [remProv]tag2 would be the driving tag for your tag group “group1”.
[remProv]tag1 further exist then under the tag group “group1”
Here comes the bug. When choosing the driving expression using the vision editor and the built-in tag browser: The editor prefixes the tag with the [remProv] while it should actually be prefixed as [default] (or maybe[~])