RX error in USRP

Hi,

Some days ago I wrote here, but I received no answer. I would be very
glad
if someone could help me… My message was the next:

“I had an “Error calling tune on subdevice” in the RX 750-1050
daughterboard
while I was running “usrp_two_tone_loopback” in GRC. It was working
successfully but I touched my SMA Antenna and suddendly it began to fail
and
when I tried to restart the program, the system gave me this error. I
guess
something must be wrong with function “tune”, but I don’t know what to
do in
order to solve the problem. Any idea? Thanks in advance!”

Everything point to the function called tune, but I don’t understand why
the
TX frequency can be tuned perfectly and the RX one can not…

Thanks again

Alvaro