https://devzone.nordicsemi.com/f/nordic-q-a/53813/nfc-issues-with-sdk-15-3I tested the NFC transceiver APDU of the project nfc_uart is good. Then I ported the NFC code to the project ble_app_uart. When the board is simulated, the program pointer will enter the function app_error_fault_handler when placed on the reader. COMen-USTelligent Community 13Thu, 31 Oct 2019 00:42:16 GMThttps://devzone.nordicsemi.com/thread/217640?ContentTypeID=1Thu, 31 Oct 2019 00:42:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d0fbfad5-46b9-4820-ac96-7ef5dde353basixaddone<p>Yes, thanks . I have&nbsp;been resolved</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/217604?ContentTypeID=1Wed, 30 Oct 2019 16:35:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3b3f90fb-1cee-4ee5-ba8c-059f2a9d64a2Sigurd<p>Hi,</p> [quote userid="84629" url="~/f/nordic-q-a/53813/nfc-issues-with-sdk-15-3"]When the board is simulated[/quote] <p>What do you mean by this?&nbsp;You place the NFC antenna on the reader ?</p> [quote userid="84629" url="~/f/nordic-q-a/53813/nfc-issues-with-sdk-15-3"]the program pointer will enter the function app_error_fault_handler[/quote] <p>Set your project in debug configuration, or set DEBUG as a preprocessor define. The&nbsp;app_error_fault_handler() should tell you the name of the function that caused the error, and the error value that the function returned.</p><div style="clear:both;"></div>