When I joined two project I have error "Undefined symbol ble_nus_init"

[audiya]

When I joined project "1. ble_app_uart" and "ble_app_hrs_nfc_pairing" I have error after compiling project.

._build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_init (referred from main.o). ._build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_on_ble_evt (referred from main.o). ._build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_string_send (referred from main.o). Not enough information to list image symbols.

I using SDK 14 and SoftDevice s132.

[MartinBL]

It looks like you have forgotten to add the ble_nus.c file in your project. You can find the file in the folder "your_sdk\components\ble\ble_services\ble_nus".