First verify Default Gateway address exists and is in the correct format in Computer - Network - TCPIP
Second, Drag & Drop one of those devices on the Map list rule.
What is the result you see than?
first of all thanks for the fast reply.
Actually the Default Gateway Adress does not exsist. That explains why the rule doesn't work.
I checked the entry on the server and the default adress is set but the entry isn't shown in the inventory. The Inventory Network/TCPIP Entry should be delivered by the inventory scan. Any ideas why this does not happen?`