Gateways network: messages to remote gateway

Hi all,
I succeded to create a gateway network between an Ignition gateway v. 8.0.16 and an Ignition gateway v. 7.9.9. Now if I try to issue a sendMessage with scope='G' from gateway v. 8.0.16 to v. 7.9.9. the following exceptions are logged to the 7.9.9 wrapper.log:

first exception

second exception

Any suggestion? Different Ignition gateway versions matter?

Thanks, regards

Yes, absolutely. Sending messages between 7.9 and 8.0 requires the different gateways be at least version 7.9.14 or 8.0.11, respectively.

Ok, thanks.