Error: (Error -1170 Unable to access DAP

Hi,

I am programming the µC CC2652R1 from Texas Instruments.
After an unspecific time, the error as in the image shown appears.

As debugger the XDS110 is used.
The program implements the TI-RTOS.
The error only appears, when starting one specific project. I checked 
all hardware connections to the debugger and they seem to be fine.

Do you have any idea what can cause this error?

If you need more details, just let me know.

Thanks a lot.