In the example below the project has the following networks:

If you get a message "Unable to attach interface" error - please first reboot the Virtual Machine.

To do that, open the drop down menu to the right of an instance:

Select "Soft Reboot Instance ".

If it does not help, try "Hard Reboot Instance".

Now choose option "Attach Interface":

and select your network:

eg. eodata:

click - attach Interface.

In the column IP Address you should see the new address (eodata: 10.111.x.x):

If it still not working you should restart interface so first choose "Detach Interface" and again select "Attach Interface".

If you still have problems, please contact CREODIAS support (https://creodias.eu/contact-us).