I am working on a Hybrid App (Web UI with Native Service) of API version 4.0 for my Gear S3 Frontier. 

I implemented the communication mechanism using Message Ports. Now here’s the workflow so far:

• Web UI App is run.
• By tapping on textbox, the Native Service App is launched successfully.
• It sends the message successfully to the Web UI.
• The Web UI receives the message, updates the screen and sends the message to the Service App.
• The Service App gets crashed in response.

I’ve checked that the service app message callback function is called and I’ve received the bundle of size 1 (using bundle_get_count method) but when I try to get the message by “bundle_get_str” method, the serviceApp gets crashed. The log data related to message port communication between the two apps is given below:

Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_common.c: initialize_common(234) > init : spzIhJA8q2.MyApp
Info / MESSAGE_PORT ( 4024 : 4024 ) : message_port_common.c: initialize_common(234) > init : spzIhJA8q2.myservice
Info / MESSAGE_PORT ( 4024 : 4024 ) : message_port_local.c: send_message(1013) > sock pair : 18, 20
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_remote.c: __dbus_method_call_handler(811) > method_name: send_message
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_remote.c: __receive_message(666) > g_unix_fd_list_get 1 fd: [114]
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_remote.c: __on_sender_name_appeared(720) > sender name appeared : :1.
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_local.c: send_message(1013) > sock pair : 115, 116
Info / MESSAGE_PORT ( 4024 : 4024 ) : message_port_remote.c: __dbus_method_call_handler(811) > method_name: send_message
Error / MESSAGE_PORT ( 3909 : 3909 ) : message_port_common.c: read_socket(148) > read_socket: ...read EOF, socket closed
Error / MESSAGE_PORT ( 3909 : 3909 ) : message_port_common.c: read_string_from_socket(181) > read socket fail
Error / MESSAGE_PORT ( 3909 : 3909 ) : message_port_remote.c: __message_port_recv_raw(257) > read socket fail: port_name
Error / MESSAGE_PORT ( 3909 : 3909 ) : message_port_remote.c: __socket_request_handler(386) > recv error on SOCKET
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_remote.c: __socket_destroy_handler(428) > __socket_destroy_handler
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_local.c: __socket_disconnect_handler(383) > __socket_disconnect_handl
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_local.c: __free_port_info(190) > __free_port_info : remote_app_id : s
Info / MESSAGE_PORT ( 3909 : 3909 ) : message_port_local.c: __socket_destroy_handler(393) > __socket_destroy_handler
Warning / MESSAGE_PORT ( 2778 : 2778 ) : message_port_common.c: read_socket(153) > read_socket: 11 , sleep and retry ...
Warning / MESSAGE_PORT ( 3085 : 3085 ) : message_port_common.c: read_socket(153) > read_socket: 11 , sleep and retry ...