For a model b configuration with a PC server, I recently found out that when you run the X_CPU.exe utility, the selection of a NIC card to use to generate the CPU text file will point your LANSA configuration to that NIC card.
Normally I go with the first NIC card I see when no information is provided, upon hearing that CPU not found in database I thought maybe try the 2nd nic card.
This generates a LANSA WEBSERVER IS NOT LICENSED error page.
Now you know.