This message indicates that notification messages that cause this event are not explicitly handled in the notify processing code. Notify messages that cause this event are not explicitly handled in the notify processing code.
Examine the specific reason information. Many notify messages indicate a configuration setting that the peer does not accept.
Most often, this error message is seen when there is a misconfiguration (some attributes are not matched) for a LAN-to-LAN VPN tunnel between the Cisco VPN 3000 Concentrator and a third-party PIX Firewall.
Check the network lists (Access Control Lists [ACLs]) on both ends of this VPN tunnel.