Hello
 
This message seems to indicate that your board is not configured properly.
Actually the debugger is not able to write to address 0x20400000.
 
Can you check the following:
  - Are you using the appropriate register configuration file?
    This file is specified in the "SC Debugger Target" panel from the "Target settings" dialog.
  - Are you using the appropriate memory configuration file?
    This file is specified in the "Remote Debugging Options" panel from the "Target settings" dialog.
If you have a PC where this was working, please check which files are specified there and also check the difference between these files and the one you are using on the new Host.
 
I hope that helps.
 
CrasyCat