Could not connect to target when use GDB debug in VSCode

[lkb]

Hi,

nRF54L15 DK + VSCODE + nRF connect for VSCODE,

I test example peripheral_uart, when click debug to start debugging with GDB，it show error：

Starting: "C:\Program Files\SEGGER\JLink_V794a\JLinkGDBServerCL.exe" -if SWD -speed 4000 -device nRF54L15_M33 -select usb=1057795718 -port 9808 -rtos GDBServer/RTOSPlugin_Zephyr -singlerun -nogui -halt -noir -silent

Starting: "C:\ncs\toolchains\b8b84efebd\opt\zephyr-sdk\arm-zephyr-eabi\bin\arm-zephyr-eabi-gdb.exe" --interpreter=mi -q

Could not connect to target.

Please check power, connection and settings.

"C:\Program Files\SEGGER\JLink_V794a\JLinkGDBServerCL.exe" exited with code -3 (0xFFFFFFFD).

But if I change nRF54L15_M33 to Cortex-M33, and delete option "-silent" , and run the command in windows terminal, it looks ok:

Connecting to J-Link...
J-Link is connected.
Firmware: J-Link OB-nRF5340-NordicSemi compiled Jul 8 2025 10:15:34
Hardware: V1.00
S/N: 1057795718
Feature(s): RDI, FlashBP, FlashDL, JFlash, GDB
Checking target voltage...
Target voltage: 3.30 V
Listening on TCP/IP port 13985
Connecting to target...
Core security extensions: Implemented
Connected to target
Waiting for GDB connection...

So, how to fix this error ?

Thanks.

[lkb]

The issue has been resolved. I installed JLINK V870 and it worked.

Thanks.