Error message:
Could not connect to IP interface. There are no more unique additional addresses available.
Solution
The IP interface can provide multiple tunneling connections. Each Tunneling connection needs its own individual address and this has to be unique within the device to be usable.
This error is shown if, in principle, there are still free tunnelling connections, but none of the free ones has a unique address. If, for example, all tunnelling connections have the same address and another client is already connected, ETS cannot receive a unique address and this error message appears.
Please refer to the product documentation on how to set the tunnelling addresses.