https://devzone.nordicsemi.com/f/nordic-q-a/10928/how-to-use-the-app_error_checki find that the macro APP_ERROR_CHECK call the macro APP_ERROR_HANDLER do \ { \ const uint32_t LOCAL_ERR_CODE = (ERR_CODE); \ if (LOCAL_ERR_CODE != NRF_SUCCESS) \ { \ APP_ERROR_HANDLER(LOCAL_ERR_CODE); \ } \ } while (0) and than theen-USTelligent Community 13Fri, 18 Dec 2015 07:56:32 GMThttps://devzone.nordicsemi.com/thread/40854?ContentTypeID=1Fri, 18 Dec 2015 07:56:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9404440c-0cb5-44b7-b988-3a1e90a7af01bjorn-spockeli<p>Take a look at this <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/#60126">post</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/40853?ContentTypeID=1Fri, 18 Dec 2015 07:48:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:826293ea-de14-4a51-a60a-870404bc002dbernerd<p>i am sorry for my Vague questions</p> <p>i mean ,should i set a break point in this function,,when jump in this function , i can check the values : m_error_code , m_line_num , m_p_file_name ,</p> <p>the m_error_code is a Integer value, and i should determine the extra error with the integer value.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/40852?ContentTypeID=1Fri, 18 Dec 2015 05:43:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4dbcc5c6-1511-4bbd-aec1-8f6a9e24277eRK<p>What do you mean &quot;take use of it&quot;? There&#39;s a function returns non zero, APP_ERROR_CHECK eventually calls the error handler routine. You can break in it to see how you got an error or replace it with a function of your own to reset the chip, dump a stack trace to flash or anything else.</p><div style="clear:both;"></div>