CubeIDE 1.19.0: Failed to enable Live Expression. Connection failed

[Gaston]

This does not happen in CubeIDE 1.15.1 and the solution suggested in this post does not work either.

How can I fix this issue?

Thanks in advance,
Gaston

[Andrew Neil]

It says, "Connection failed" - can you do anything else in the debugger?

[Souhaib MAZHOUD]

Hello @Gaston 

Could you please share your Debug configuration, or your Log file?

KR, Souhaib

[Gaston]

Where is the Log file?

Here's the Output Console

STMicroelectronics ST-LINK GDB server. Version 7.11.0
Copyright (c) 2025, 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
Waiting for debugger connection...
Debugger connected
Waiting for debugger connection...
 -------------------------------------------------------------------
 STM32CubeProgrammer v2.20.0 
 -------------------------------------------------------------------



Log output file: /tmp/STM32CubeProgrammer_RyEdAC.log
ST-LINK SN : 52FF70064980515749250487
ST-LINK FW : V2J46S7
Board : --
Voltage : 3,19V
SWD freq : 4000 KHz
Connect mode: Under Reset
Reset mode : Hardware reset
Device ID : 0x443
Revision ID : Rev Z
Device name : STM32C01x
Flash size : 16 KBytes
Device type : MCU
Device CPU : Cortex-M0+
BL Version : 0x51



Opening and parsing file: ST-LINK_GDB_server_xCzbYs.srec


Memory Programming ...
 File : ST-LINK_GDB_server_xCzbYs.srec
 Size : 12.82 KB 
 Address : 0x08000000


Erasing memory corresponding to segment 0:
Erasing internal memory sectors [0 6]
Download in Progress:


File download complete
Time elapsed during download operation: 00:00:00.480

and the Debug Configuration

Gaston

[Souhaib MAZHOUD]

Just check "Log to file" in debug configuration so you can find your log. 

Could you try to test with OpenOCD and check if the issue persists?