JLINK V9 cannot download the code.

[Ted]

I Modify my code for 7 buttons from 7 gpios. But my code has a issue at sdk_config.h. The define of GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS is 9. When I built the code and download the code to my target board though Jlink V9. It is OK first time. But it always fail if I want to download code again. Does anyone knows why? How to solve it? Why my error program made the target board cannot re-download again.

[Ted]

Error message:

* JLink Info: Device "NRF52840_XXAA" selected.

JLink info:
------------
DLL: V6.54c, compiled Nov 7 2019 17:01:02
Firmware: J-Link V9 compiled May 17 2019 09:50:41
Hardware: V9.40
S/N : 59404841
Feature(s) : RDI, GDB, FlashDL, FlashBP, JFlash

* JLink Info: InitTarget() start
* JLink Info: InitTarget() end
* JLink Info: Found SW-DP with ID 0x2BA01477
* JLink Info: Could not power-up debug power domain.
* JLink Info: Scanning AP map to find all available APs
* JLink Info: AP[1]: Stopped AP scan as end of AP map has been reached
* JLink Info: AP[0]: AHB-AP (IDR: 0x24770011)
* JLink Info: Iterating through AP map to find AHB-AP to use
* JLink Info: AP[0]: Skipped. No ROM table (AHB-AP ROM base: 0x00000000)
* JLink Info: InitTarget() start
* JLink Info: InitTarget() end
* JLink Info: Found SW-DP with ID 0x2BA01477
* JLink Info: Scanning AP map to find all available APs
* JLink Info: AP[2]: Stopped AP scan as end of AP map has been reached
* JLink Info: AP[0]: AHB-AP (IDR: 0x24770011)
* JLink Info: AP[1]: JTAG-AP (IDR: 0x02880000)
* JLink Info: Iterating through AP map to find AHB-AP to use
* JLink Info: AP[0]: Core found
* JLink Info: AP[0]: AHB-AP ROM base: 0xE00FF000
* JLink Info: CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
* JLink Info: Found Cortex-M4 r0p1, Little endian.
* JLink Info: FPUnit: 6 code (BP) slots and 2 literal slots
* JLink Info: CoreSight components:
* JLink Info: ROMTbl[0] @ E00FF000
* JLink Info: ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
* JLink Info: ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
* JLink Info: ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
* JLink Info: ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
* JLink Info: ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
* JLink Info: ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
***JLink Error: Could not find core in Coresight setup
ROMTableAddr = 0xE00FF000
Error: Flash Download failed - Target DLL has been cancelled
Flash Load finished at 18:51:41