Hi Gabriel, Can you paste the error message from logcat? Also you can check [this example](https://github.com/rosjava/rosjava_bootstrap/blob/kinetic/message_generation/src/test/java/org/ros/internal/message/RawMessageSerializationTest.java#L244-L252) to compare. --- [Visit Topic](https://discourse.ros.org/t/sending-a-byte-array-message/2534/2) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: