This means isakmp policy is not configured, if this is a L2L session configure isakmp policy as this is part of Ipsec Phase 1 negotiation, if this session does not stablish L2L will not happen.
[edit] I take above back.
see error log 713042
Error Message %PIX|ASA-3-713042: IKE Initiator unable to find policy: Intf
interface_number, Src: source_address, Dst: dest_address
Explanation This message indicates that the IPSec fast path processed a packet that triggered IKE, but IKE's policy lookup failed. This error could be timing related. The ACLs that triggered IKE might have been deleted before IKE processed the initiation request. This problem will most likely correct itself.
Explanation If the condition persists, check the L2L configuration, paying special attention to the ACLs associated
http://www.cisco.com/en/US/docs/security/asa/asa72/system/message/logmsgs.html
Jorge Rodriguez