What can be the problem here?

Can, will, someone please tell me what the problem is here?

Can you post a few more lines before this point?

With all pleasure, but it’s just a blinking LED program. It builds well and it executes well.
So, my question is just about the unexplained fault message.
With more or less the same code in a different program version, the message
It’s no big deal, but just annoying.