Check that the GWADM server being executed is of the correct release/version number. Also check that for the DMADM server. If the GWADM server belongs to an incorrect version, reboot only the Gateway group with the correct GWADM server. If DMADM server belongs to an incorrect version, reboot the entire set of Domain servers (DMADM, all GWADM(s), all Gateways) using the correct DMADM server.