https://devzone.nordicsemi.com/f/nordic-q-a/63534/error-in-sd_ble_gap_device_name_setHi everyone, I&#39;m using the nrf5_SDK_for_Mesh_v4.1.0 and i&#39;m having troubles by trying to change the BLE name. In the function gap_params_init i added a code to concatenate a the GAP_DEVICE_NAME with the DEVICEID so that i can have a unique name foren-USTelligent Community 13Fri, 10 Jul 2020 09:26:13 GMThttps://devzone.nordicsemi.com/thread/259390?ContentTypeID=1Fri, 10 Jul 2020 09:26:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ea0e298-e5a1-4b94-be11-d5dbeb41e33etesc<p>Hi,</p> <p>Error code 3 from <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s140.api.v7.0.1%2Fgroup___b_l_e___g_a_p___f_u_n_c_t_i_o_n_s.html&amp;anchor=gae779f7eed346027dc4cbaf438352e5db">sd_ble_gap_device_name_set()</a> is <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s140.api.v7.0.1%2Fgroup__nrf__error.html&amp;anchor=gadf8b0c33ea15352808e5ac7f69c2be8a">NRF_ERROR_INTERNAL</a>. It is not directly documented why this would happen, but there might be issues with the arguments that you send in, that was not detected before they caused an issue.</p> <p>Suggestions for how to start debugging this:</p> <ul> <li>Figure out what device_name looks like, and whether it is actually a UTF-8 encoded, non NULL-terminated string.</li> <li>Check that it does not get too long to fit in the char array of size 15 that you use for it, as if not you do have a buffer overflow error in your code. In this case, it would mean some of the other local variables in that function are overwritten/corrupted.</li> </ul> <p>Regards,<br />Terje</p><div style="clear:both;"></div>