Timeout is the result of hitting the umq_ulb_application_set_message_max_reassignments number of assignments

C# |
public const int SRC_EVENT_UMQ_ULB_MESSAGE_TIMEOUT_EX_FLAG_MAX_REASSIGNS
C# |
public const int SRC_EVENT_UMQ_ULB_MESSAGE_TIMEOUT_EX_FLAG_MAX_REASSIGNS