Fails to start debugging session

Discussions concerning TrueSTUDIO for STM32 9.0.0 and later versions.

Moderators: Markus Girdland, Mattias Norlander

Posts: 6
Joined: Wed Feb 21, 2018 8:50 am

Fails to start debugging session

Postby marbel » Thu Oct 25, 2018 8:06 am

With atollic 9.1.0 i quite often get the following result when i try to start a session.

Any clues?

// Martin

STMicroelectronics ST-LINK GDB server. Version 5.0.2
Copyright (c) 2018, 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

Waiting for debugger connection...
Debugger connected
STM32CubeProgrammer v1.2.1

Log output file: C:\Users\BEL~1.LUN\AppData\Local\Temp\STM32CubeProgrammer_a06952.log
ST-LINK SN : 36FF6D064D59303623321643
Voltage : 3.22V
Warning: unknown or unsupported device
Error: Device not supported
Error: flash loader cannot be loaded. FlashLoaderPath = C:/Program Files (x86)/Atollic/TrueSTUDIO for STM32 9.1.0/Servers/STM32CubeProgrammer/bin/FlashLoader/0x0.stldr
Error: Connection to target must be established before performing the write command.
Encountered Error when opening ..\STM32CubeProgrammer\bin\STM32_Programmer_CLI.exe
Target unknown error 19

Error in initializing ST-LINK device.
Reason: Unknown. Please check power and cabling to target.
Failed to restart ST-LINK connection
Error in STM32CubeProgrammer

Markus Girdland
Posts: 149
Joined: Thu May 11, 2017 11:27 am

Re: Fails to start debugging session

Postby Markus Girdland » Thu Oct 25, 2018 12:09 pm

Hello Martin,

We've had some reports from other users with similar errors. Not exactly that one, though.
Could you please enable gdb traces (Window -> Preferences -> C/C++ -> Debug -> gdb), start a new debug session and send the log to ?

Thanks in advance!

Posts: 1
Joined: Wed Jun 12, 2019 8:31 am

Re: Fails to start debugging session

Postby bhinder » Wed Jun 12, 2019 8:33 am

I am getting the same error as above. could you please post the answer for above question please?

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