Use labview to transmit and receive ofdm signals on usrp2974, and error "antenna name is invalid" is reported

[lunaming777]

Hello~Recently, I used labview to send and receive ofdm signals on the usrp2974. I found someone else's labview program on the github（Code in attachment）. It should be no problem, but there was a problem during the operation. The error was reported as shown in the following picture (error reported in the transmitter)

My settings in transmitter and receiver are as follows

Does anyone know what the reason is? (It's OK to run niUSRP Ex Rx continuous async before. It should be a problem set somewhere in the code.) Thank you very much for your reply!