./publisher -DCPSConfigFile ../rtps.ini (538547|538550) WARNING: MulticastManager::process: failed to join group 239.255.0.1:15902 on veth0643a40/0.0.0.0 (0x557594c04fd8 joined count 3): Unknown error -3 (538547|538550) WARNING: MulticastManager::process: failed to join group 239.255.0.1:15900 on veth0643a40/0.0.0.0 (0x557594b99e58 joined count 3): Unknown error -3 Segmentation fault (core dumped) I have tested from dds-3.18 to dds-3.24 . Test at ubuntu 20.04, g++ 9.3 The Segmentation fault at : DDS::DataWriter_var writer = publisher->create_datawriter(topic.in(), qos, 0, OpenDDS::DCPS::DEFAULT_STATUS_MASK); But I have test use docker image objectcomputing/opendds_ros2 and ghcr.io/objectcomputing/opendds:latest-release, the error is not exist. I don't know which cause the error.