UE4 crashes while loading a custom map in Carla

I am creating a map in Carla simulator, which is based on Unreal Engine. I have created a map and imported in a build from source (Linux - Ubuntu 18.04) machine. The documentation for Carla can be found here: (https://carla.readthedocs.io/en/latest/tuto_A_add_map/#map-ingestion-in-a-build-from-source) However the map loaded the very first time I imported it. However now when I click on File->Open level → map_package → “the imported map file”, unreal engine is crashing, sometimes it is showing out of device memory, sometime the error is “caught signal 11”. I am not able to resolve this error.

My work is almost done, I just have to export the map, not able to do this from past 2 days. I have tried out following things:

  1. Discard the map and reimport the map
  2. make rebuild-- Carla didn’t launch after doing this
  3. Reinstall carla and built if from scratch

I have attached the log files here. Please take a look and help me resolve this issue.link text