Error message from debugger back end: Error finishing flash operation ,Failed to execute MI command:

Hello,

I am using STM32CubeAI Studio with the NUCLEO-N657X0-Q board.

Board:

• STM32N657X0H3Q
• NUCLEO-N657X0-Q

Tools:

• STM32CubeIDE 2.1.1
• STM32CubeMX 6.17.0
• STM32CubeProgrammer 2.22.0
• STM32CubeAI Studio

I generated a project from STM32CubeAI Studio and tried to run/debug it, but flashing always fails.

Main error:

Error finishing flash operation
failed to erase memory
Load failed

Detailed log:

Erasing external memory sectors [16 19]
Error: failed to erase memory

Additional information:

ST-LINK FW : V3J17M10
Board : NUCLEO-N657X0-Q
Device name : STM32N657
SWD freq : 8000 KHz
Connect mode: Hot Plug
Reset mode : Software reset

I already tried:

• Full chip erase using STM32CubeProgrammer
• Under Reset mode
• Lower SWD frequency (4000 / 2000)
• Regenerating project
• Rebuilding FSBL and Application
• Reconnecting USB power
• Creating a new CubeAI Studio project

However, the same error still occurs.

Could this be related to:

• external XSPI flash loader,
• STM32CubeIDE version compatibility,
• CubeAI Studio generated partition layout,
• or STM32N6 external memory initialization?

I would appreciate any guidance.

Thank you.