Error in final launch sequence: Failed to start GDB server

Hi,

I wrote a code with stm32f407vg board on stm32cubeide.

There was no error in build, but when I run this program, there is error like title.

The full contents in error message is:

Error in final launch sequence:

Failed to start GDB server

Error in initializing ST-LINK device.

Reason: (255) Unknown. Please check power and cabling to target.

It's connecting on my computer properly, and when I run other program a few days ago, It was work well.

How can I solve this problem?

Thanks for any answer.

This topic has been closed for replies.

Chief III

First check STLink with other sw utility or newer programmer. Use connect under reset.

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