Debugger fails on connection with message: Could not connect core.

[chiel_timmerman]

When i try to start the debugger i get the message: " Failed on connect: Ee(42). Could not connect to core.", "No connection to chips' s debug port. 

Im running on: w10

MCUXpresso IDE V11.1.1 

Board: LPCXpresso55s28 revision A2.

Running the hello world example project

The board is working on ubuntu. I can upload programs and everything is working.

Things i tried:
I've tried other cables. 

I've reinstalled the IDE.
I've done a mass erase on ubuntu to see if that did something. 

All error messages:

[oprakash]

HI 

I am facing the same problem from yesterday.

I have done everything like 

1.reintalled the ide 

2.recloned the code again

3. used other cables.

but the result is same can anyone help me out with this.

[converse]

I see one of the messages is 

Connecting to Probe 1 Core 0 (using server started externally)

This implies that either 

- you started the server yourself (not recommended)

- there is one already running from a previous debug session (which will prevent you creating another)

Have you tried the "cleanup debug" button? (a little red square with a cross overlayed).

Then, double-check the cables, and the connections. Finally check that your device is correctly powered (some PC's have USB ports that cannot supply enough power - try other USB ports)

[chiel_timmerman]

Thank you, apparently there was already a debugsession. So when i removed al debug it started working.