Lotus Notes Traveler customers should apply Traveler (Fix Pack 4) PRIOR to upgrading the Domino Server (hosting Traveler) to Domino or later releases

From TN 1507380

Domino server (Fix Pack 3) changed one of the API calls that the Lotus Traveler server uses.  Running Domino and Lotus Traveler (or lower Fix Pack level) can cause a server crash scenario.

Traveler (includes APAR LO62635) is available from Traveler Recommended Maintenancepage.