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CLion: GDB unkown error

dvp
Associate II

‎2026-03-26 12:58 AM - last edited on ‎2026-03-26 3:58 AM by

I’m using a NUCLEO-H533RE and CLion as my development environment. Configuring and building my STM32 project works fine, but I haven’t been able to get debugging to work. I receive the following error:

  • Error in initializing ST-LINK device.
    Reason: Unknown. Please check power and cabling to target.

Using STM3CubeProgrammer I can connect with the board and did the full chip erase.

The attached images show the current settings.

Does anyone have any idea?

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3 REPLIES 3
MGogr.1
Senior

‎2026-03-26 2:08 AM

Can this be due "Debug in Low power enabled"? 

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dvp
Associate II
In response to MGogr.1

‎2026-03-26 3:45 AM

It seems that Power Saving Mode is enabled by default and cannot be unchecked in CubeMX. Or maybe it is possible, but I can't seem to find the option.

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Andrew Neil
Super User
In response to MGogr.1

‎2026-03-26 3:59 AM

@MGogr.1 wrote:

Can this be due "Debug in Low power enabled"? 

That shouldn't prevent a connection - it's there to prevent disconnection during low-power modes.

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.
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