Why does this phrase return 0x00000001?

[Fan Chengfa]

err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME, strlen(DEVICE_NAME)); APP_ERROR_CHECK(err_code);

[Fan Chengfa]

SDK and SoftDevice not compatible?

[Ole Morten]

See also https://devzone.nordicsemi.com/index.php/svc-handler-missing