Remote communication error

[Lan Zhang]

Hi,

I set up a remote debug using USB port. I got some message like: Remote
communication error: Connection timed out. And this can happen at the
begin of the debug or after I already did some debug commands. But the
whole remote debug works fine for the serial port. I think I didn't add
USB interface correctly. Could anyone point me which code related to the
remote communication error, and why this happens? 

Thanks a lot 

Lan Zhang