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W
Wol
Associate II
February 20, 2026
Question

Error trying to find "isTCPAvailable" when running STM32CubeMonitor in TCP mode

  • February 20, 2026
  • 2 replies
  • 272 views

I'm using JetBrains CLion to debug my STM32 project, and it runs `ST-LINK_gdbserver` when debugging, and passes the "--shared" flag for other STM apps to connect into. It starts up okay, and shows "Info : default port : 7184".

I've changed my "settings.js" file in "~/.STMicroelectronics/stm32cubemonitor/" folder so that "connectionType" is "tcp" and not "p2p".

I run stm32cubemonitor, and then node-red is showing up an error of:

 

Cannot read properties of undefined (reading 'isTcpAvailable') (line:59)

Screenshot from 2026-02-20 16-34-19.png

I think this code underneath is all bundled into the distributable, so I can't debug what's actually going wrong.

The versions I have installed currently are:

ii st-stm32cubeide-2.0.0 2.0.0-26820-20251114-1348-1 amd64 IDE for STM32
ii stm32cubemonitor 1.12.0 amd64 STM32CubeMonitor helps debug a...
ii st-stlink-server 2.1.1-1 amd64 stlink tcp server to permit sev...

I'm using an ST-Link/V2 ISOL

Running on Ubuntu 25.10. 

 

 

Any ideas how to fix this, or where the source code is for that node-red module, or if it's a known error. Can't find any mention of this. 

    2 replies

    PCu1
    PCu1
    Senior
    May 8, 2026

    I’m having the same problem on Windows.
    My version is newer: STM32CubeIDE 2.1.1.

    It worked for several years using TCP, but now I’ve had to switch back to P2P.

    I’ve tried running it as an administrator, reinstalling it, etc. but nothing changed

    Pierre

    Andrew Neil
    Andrew Neil
    Super User
    May 8, 2026
    @PCu1 wrote:

    I’m having the same (sic?) problem on Windows.
    My version is newer: STM32CubeIDE 2.1.1.

    But @Wol was using JetBrains CLion - not STM32CubeIDE ?

    A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
    stephane.legargeant
    stephane.legargeant
    ST Employee
    May 12, 2026

    Hello

    The "isTcpAvailable" is part of the internal probe API of STM32CubeMonitor. The problem may be a race condition when the probe is loaded inside CubeMonitor.

    As PCu1 says "It worked for several years using TCP, but now I’ve had to switch back to P2P.", it may me due to a change. It may be linked to the updates done in STM32CubeMonitor v1.11.0.

    Can you try with the version V1.10.0 ?

    Thank you

    Stephane

    PCu1
    PCu1
    Senior
    May 12, 2026

    hello,

    I tried with the version 1.10, and it works again in tcp shared mode

    As you mention, something is different with the last version.

    Pierre

    stephane.legargeant
    stephane.legargeant
    ST Employee
    May 13, 2026

    Thanks a lot for your test. 

    The issue should be fixed in the Q3 release. (1.13)

    Stephane

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