what is the general approach to troubleshooting errors like the following.  
```
RTT error: Error communicating with probe: An ARM specific error occurred.
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Error: An ARM specific error occurred.

Caused by:
    0: Error using access port
    1: Failed to write register CSW at address 0x00000000
    2: An error occurred in the communication with an access port or debug port.
    3: Target device did not respond to request.
```