Site to Site VPN routing

[Ganz_Montejo]

Hey! first time user of R80.20 here. I have a site to site VPN tunnel with remote sites H1 and H2 (they are in the same tunnel). These host are on a separate network. 239.x and 243.x. Now, my devices can access H2 but cant access H1. This following error (Missing OS Route) keeps coming up with devices while trying access H1. What are the things should I check out?

[G_W_Albrecht]

What is your SD-WAN config ? This is posted under CheckMates > Products > Quantum > SD-WAN

Also, R80.20 is out of support since some time - or do you talk about Quantum Spark R80.20.x0 ? Topology drawing could be helpfull !

[Ganz_Montejo]

This is an old appliance that is repurposed to only be used for as a gateway for asite to site VPN. Here's the diagram

[PhoneBoy]

Are you really using 239.x and 243.x addresses?
That's the multicast address space and the error message corresponds to missing configuration: https://support.checkpoint.com/results/sk/sk176868
If you're not using this address space for actual multicast traffic, use different IP addresses.
If you're using this for actual multicast traffic, then configure the appliance accordingly with PIM.