i need help with lightmass render

19:16:20: [Interface:TryOpenConnection] Local connection established
19:16:20: [Job] Accepted Job 7F60D0B6-436E8F11-30DE559F-DCEF38A1
19:16:22: [Job] Launched Job UnrealLightmass_2017-01-13_17-14-42_1414080-64bit.exe
19:16:22: [Job] PID is 9816
19:16:22: [Job] GUID is “7F60D0B6-436E8F11-30DE559F-DCEF38A1”
19:16:36: [Job] Job has failed! Job executable didn’t exit cleanly. Exit code: -1073741701
19:16:36: [CloseConnection] Closing connection 6734690C using handle 6734690C
19:16:36: [CloseConnection] Connection confirmed for disconnection 6734690C
19:16:36: [CloseConnection] Closing orphaned Job (7F60D0B6-436E8F11-30DE559F-DCEF38A1)
19:16:38: [MaintainConnections] Connection 6734690C is DISCONNECTING
19:16:41: [MaintainConnections] Connection 6734690C is DISCONNECTING
19:16:41: [CloseConnection] Connection disconnected 6734690C
19:16:41: [GetMessage] Safely returning to 6734690C with no message
19:16:43: [MaintainConnections] Local connection has closed (6734690C)
19:16:43: [MaintainConnections] Removed connection 6734690C
19:16:43: [MaintainConnections] All connections have closed