STM32 Nucleo L476RG: Debugger Connection Lost I try uploading a blank project and receive a message saying the debugger connection is lost. I tried 5 different USB Mini Cables and uploaded successfully to a completely different Nucleo Board (H745ZI-

[SMaci.1]

This is the message I receive when debugging for the STM32 Nucleo L476RG Board:

STMicroelectronics ST-LINK GDB server. Version 5.8.0

Copyright (c) 2020, STMicroelectronics. All rights reserved.

Starting server with the following options:

    Persistent Mode      : Disabled

    Logging Level       : 1

    Listen Port Number     : 61234

    Status Refresh Delay    : 15s

    Verbose Mode        : Disabled

    SWD Debug         : Enabled

    InitWhile         : Enabled

Waiting for debugger connection...

Debugger connected

Debugger connection lost.

Shutting down...

What are the next steps in the debug process? I have updated the firmware as it asked and am also using the latest software for the IDE (1.6.1).

Firmware:

Version: V2J37M27

Build:  Oct 22 2020 11:30:39

Software:

STM32CubeIDE 1.6.1

So I believe I am using the most up to date software. Thanks in advance!

[Markus GIRDLAND]

Hello there!

This issue seems very similar to another thread that is currently being investigated. I would suggest that you follow that thread and try out the suggestions provided by Mattias to see if you can get some additional information.

You can find that link here.

[SFan.1]

Download STM32CubeProgrammer, select "Erasing & Programming" on the left, then do a "Full chip erase", problem solved for my case.