I am trying to use the USRP echotimer block from gr-radar module. But when I run the flowgraph containing this block, I get the following error:
`[INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501; UHD_3.15.0.0-70-g42b6fcf6` `[INFO] [B200] Detected Device: B210` `[INFO] [B200] Operating over USB 2.` `[INFO] [B200] Initialize CODEC control...` `[INFO] [B200] Initialize Radio control...` `[INFO] [B200] Performing register loopback test... ` `[INFO] [B200] Register loopback test passed` `[INFO] [B200] Performing register loopback test... ` `[INFO] [B200] Register loopback test passed` `[INFO] [B200] Setting master clock rate selection to 'automatic'.` `[INFO] [B200] Asking for clock rate 16.000000 MHz... ` `[INFO] [B200] Actually got clock rate 16.000000 MHz.` `Using USRP Device (TX): ` `Single USRP:` ` Device: B-Series Device` ` Mboard 0: B210` ` RX Channel: 0` ` RX DSP: 0` ` RX Dboard: A` ` RX Subdev: FE-RX2` ` RX Channel: 1` ` RX DSP: 1` ` RX Dboard: A` ` RX Subdev: FE-RX1` ` TX Channel: 0` ` TX DSP: 0` ` TX Dboard: A` ` TX Subdev: FE-TX2` ` TX Channel: 1` ` TX DSP: 1` ` TX Dboard: A` ` TX Subdev: FE-TX1` `Setting TX Rate: 2000000` `[INFO] [B200] Asking for clock rate 32.000000 MHz... ` `[INFO] [B200] Actually got clock rate 32.000000 MHz.` `Actual TX Rate: 2e+06` `[INFO] [USRP2] Opening a USRP2/N-Series device...` `[INFO] [USRP2] Current recv frame size: 1472 bytes` `[INFO] [USRP2] Current send frame size: 1472 bytes` `[WARNING] [UHD] Unable to set the thread priority. Performance may be negatively affected.` `Please see the general application notes in the manual for instructions.` `EnvironmentError: OSError: error in pthread_setschedparam` `Using USRP Device (RX): ` `Single USRP:` ` Device: USRP2 / N-Series Device` ` Mboard 0: N210r4` ` RX Channel: 0` ` RX DSP: 0` ` RX Dboard: A` ` RX Subdev: WBXv3 RX+GDB` ` TX Channel: 0` ` TX DSP: 0` ` TX Dboard: A` ` TX Subdev: WBXv3 TX+GDB` `Setting RX Rate: 2000000` `Actual RX Rate: 2e+06` `set_min_output_buffer on block 1 to 2400` `set_min_output_buffer on block 2 to 2400` `terminate called after throwing an instance of 'std::runtime_error'` ` what(): Receiver error ERROR_CODE_LATE_COMMAND` My transmit device is USRP B210 and the receiver is USRP N210. The settings of the USRP Echotimer block are attached. What could be causing this error?
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