system win7/64bit
version 2.5 sept 4th/nightly
map: "bomber in the city" terror mission
science tree is nearly done so it was a last tier battle
somewhen in the battle it crashed with following message (see log screen views)
ERROR: LE_NotFoundError: Could not get LE with entnum 50 of type: 3 (src/client/battlescape/events/event/world/e_event_entperish.cpp:44)