What is causing the error "Undefined symbol app_error_handler"?

Question

I'm using nRF51822 to communicate with nRF24L01+ without SoftDevice, and it is working fine. 
 But when I add app_timer.c to the project and compile, it will show the following error: 
 ._buildadio_tx_example_arm.axf: Error: L6218E: Undefined symbol app_error_handler (referred from app_timer.o). 
 I have added #include "app_error.h" and #include "nrf_error.h", and the include path is included. 
 I'm working with the radio_example found in nrf51822\Board
rf6310adio_example. 
 Does anyone know what is causing the error?

Petter Myhre · Accepted Answer

Have you defined the app_error_handler function in main.c? 
 void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t * p_file_name)
{...} 
 It should be defined in the top of main.c in all examples that are handling errors. 
 For more information, please examine one of the examples in the S110 folder, for example ble_app_hrs.

What is causing the error "Undefined symbol app_error_handler"?

Top Replies