The interface firmware FAILED to reset/halt the target MCU (NUCLEO-F446RE)

[FAger.1]

Hi, I'm new to this, so bare with me :)

I'm following the UM2421 - getting startet guide for the P-NUCLEO-IOM01M1, and everytime I connect the USB to my PC, I get the FAIL.txt where it says: The interface firmware FAILED to reset/halt the target MCU. I believe that, this problem prevents me for connecting to my IO-link device?

I have tried to reinstall the ST-LINK, update the firmware on the NUCLEO-F446RE, rebooting my PC, but everytime i get the FAIL.txt saying the same thing.

I have no idea what to do, so please if someone have a solution for this problem.

[NBenn.1]

Hi, 

In my case, I had the same error with my nucleo plugged into a breadboard and removing it from the breadboard immediately resolved the problem. Maybe extra capacitance from the breadboard pins was the root cause for me. Maybe you should try isolating your system from any external circuits/elements as much as possible and try again. 

[Ww23]

This literally solved my problem.  How did you use it with the breadboard after? Thanks