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With STM32Cube IDE v1.15.0 update problem with STLink

Associate II

Hello all,

I have updated the STM32Cube IDE version to the 1.15.0, it has own STLinkUpgrade tool which is also updated to version 3.14.5. But a problem arised. It wants me to update my STLink V2 firmware. When I tried, It gives error like:

"Unexpected flash size for ST-Link Micro. Don`t know how to upgrade."


But I can use the older version 3.13.4 without any problem:


Is there a problem caused by 3.13.5 or caused by my ST-Link V2?




Accepted Solutions
Associate II

Summary: I tried with the latest ST-LINK Updater exe version 3.15.6 and my problem has been resolved.


Document: Firmware upgrade for ST-LINK, ST-LINK/V2, ST-LINK/V2-1 and STLINK‑V3 boards - Release note


It is happy to see my issue on fixes issues list.

The newer version of updater is not embedded on IDE yet. You need to download from here: STSW-LINK007 - ST-LINK, ST-LINK/V2, ST-LINK/V2-1, STLINK-V3 boards firmware upgrade - STMicroelectronics



View solution in original post

ST Employee

Hello @mcagriaksoy 

Can you give more details about the board/MCU that you are using.

Best Regards.


To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Hello, @STTwo-32 I am using STLink V2, my MCU is "STM32G491CCU"



How about a picture of the bottom side of the STLink.  There are quite a few clones out there.  This may be that the newer updater version had more robust checks for clone units.  Just guessing here.

Associate III

I have the same situation after the last CubeIDE update.

Hi bob, thanks for the message, I am sure that my device is not clone.

I had the same problem. I couldn't do FW update directly from CubeIDE. Nor from CubeProgramer.
I reinstalled STM CubeProgramer using the last version.
I was able to do FW update from this tool then I could use ST_Link/V2 in CubeIDE for programming and debugging.

Senior II

My v15 updated my STLINK V3 successfully but the debugger is not found afterwards

Encountered Error when opening C:\ST\STM32CubeIDE_1.13.2\STM32CubeIDE\plugins\\tools\bin\STM32_Programmer_CLI.exe
Error in STM32CubeProgrammer

(the file is present)

Cube IDE 1.15.0 is brain-dead. I reverted to Cube 1.14.1 and everything works. v15 brings GCC v12 tools and they have other issues - see other threads which suggest that some dud code is generated. But with no working debugger I can't track it down, obviously.

I have the same problem... (

ST Employee

Hello All, 

For the original issue of the Post, I have reported internally for more investigation via Internal ticket number: 176701. For the second issue initiated by @PHolt.1, it is also reported by my colleague @Imen.D for investigation under ticket number 176694.

(PS: Internal tickets numbers are only for reference, not available outside of ST) 

Best Regards.


To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.