Can not save boot loader setting (bootloader_settings_t) when disable IS_SRVC_CHANGED_CHARACT_PRESENT 0 in bootloader

Question

I'm using SDK 12.2.0, SofDevice 3.0 and my chip nRF52832. 
 In my boot-loader project i disable IS_SRVC_CHANGED_CHARACT_PRESENT by define to 0. 
 The dfu process is completed and firmware was tranferred but boot-loader can not jump to application because the 
 bootloader_settings_t cannot saved in method bootloader_settings_save of bootloader.c file 
 
 I have another test with enable IS_SRVC_CHANGED_CHARACT_PRESENT the dfu process was successful.

Jason · Accepted Answer

Thanks, 
 Finally i found where my code go wrong. 
 /**@brief Function for the Application's S110 SoftDevice event handler.
 *
 * @param[in] p_ble_evt S110 SoftDevice event.
 */
static void on_ble_evt(ble_evt_t * p_ble_evt)
{
 uint32_t err_code;
 ble_gatts_rw_authorize_reply_params_t auth_reply;

 switch (p_ble_evt->header.evt_id)
 {
 case BLE_GAP_EVT_CONNECTED:

 m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
 m_is_advertising = false;
 break;

 case BLE_GAP_EVT_DISCONNECTED:
 {
 uint8_t sys_attr[128];
 uint16_t sys_attr_len = 128;

 m_direct_adv_cnt = APP_DIRECTED_ADV_TIMEOUT;

 err_code = sd_ble_gatts_sys_attr_get(m_conn_handle,
 sys_attr,
 &sys_attr_len,
 BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS);
 APP_ERROR_CHECK(err_code);

 }
 if (!m_tear_down_in_progress)
 {
 // The Disconnected event is because of an external event. (Link loss or
 // disconnect triggered by the DFU Controller before the firmware update was
 // complete).
 // Restart advertising so that the DFU Controller can reconnect if possible.
 advertising_start();
 }

 m_conn_handle = BLE_CONN_HANDLE_INVALID;

 break; 
 In above function, when we get BLE_GAP_EVT_DISCONNECTED, 
 we also call 
 err_code = sd_ble_gatts_sys_attr_get(m_conn_handle,
 sys_attr,
 &sys_attr_len,
 BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS);
 APP_ERROR_CHECK(err_code); 
 I don't know why we call that function, but it will return an NRF_ERROR_NOT_FOUND and make system reboot. I think that removing service change characteristic make my Generic Attribute Service empty and make that error. So my current solution is remove APP_ERROR_CHECK(err_code); line and use the original bootloader_settings_save method.

Can not save boot loader setting (bootloader_settings_t) when disable IS_SRVC_CHANGED_CHARACT_PRESENT 0 in bootloader

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