TX/RX and RX2 with same USRP source block

I have received an exception called: “Floating point exception”, I guess
that the reason is because I am trying to use the ports TX/RX and RX2
with an USRP-SOURCE (please review the code below).

Is there any special configuration to use USRP with GNURadio with that
specific configuration?

regards,

Richard

#=================[Python Code]==============

           self.uhd_usrp_source_0_0 = uhd.usrp_source(
                    device_addr="addr=192.168.10.8",
                    stream_args=uhd.stream_args(
                            cpu_format="fc32",
                            channels=range(1),
                    ),
            )
            self.uhd_usrp_source_0_0.set_samp_rate(samp_rate)
            self.uhd_usrp_source_0_0.set_center_freq(800e6, 0)
            self.uhd_usrp_source_0_0.set_gain(0, 0)
            self.uhd_usrp_source_0 = uhd.usrp_source(
                    device_addr="addr=192.168.10.8",
                    stream_args=uhd.stream_args(
                            cpu_format="fc32",
                            channels=range(1),
                    ),
            )
            self.uhd_usrp_source_0.set_samp_rate(samp_rate)
            self.uhd_usrp_source_0.set_center_freq(700e6, 0)
            self.uhd_usrp_source_0.set_gain(0, 0)

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