Hi Rubén, To me this looks like a network issue. From your printout I can see that you call uhd_usrp_probe on the good device itself. Have you logged into the erroneous device and run uhd_usrp_probe there just to verify? Have you checked that the IP configuration is correct? We have seen some weird things with wrong routes, IP addresses in the wrong subnet, using two SFP connections crossed and so on. Some of them have been collected in our manual: https://uhd.readthedocs.io/en/latest/page_usrp_x4xx.html#x4xx_network_troubleshooting_tips
A typical setup is having the X440 connected via the RJ45 connector to either the host directly or via a switch (plus the SFP connection for data). If this network uses DHCP it takes you the burden to configure the IP addresses properly. For uhd_usrp_probe this is sufficient and with that it should return the expected output. For the actual streaming it may make sense to open the session with those arguments: addr=[the IP of the 10 Gbps interface],mgmt_addr=[the IP of the RJ45 interface]. I hope that helps, Martin From: Rubén Serrano via USRP-users <usrp-users@lists.ettus.com> Sent: Thursday, August 21, 2025 9:00 AM To: usrp-users@lists.ettus.com Subject: [EXTERNAL] [USRP-users] Error with ettus x440: Failure to create rfnoc_graph. Hi All, I am trying to run the following command with a configurated ettus x440: uhd_usrp_probe , and i am getting the next (complete) output: [INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.8.0.heads-v4.8.0.0-0-g308126a4 [INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=192.168.0.3,type=x4xx,product=x440,serial=34B2ACC,name=ni-x4xx-34B2ACC,fpga=X4_400,claimed=False,addr=192.168.0.3 [INFO] [MPM.PeriphManager] init() called with device args `fpga=X4_400,mgmt_addr=192.168.0.3,name=ni-x4xx-34B2ACC,product=x440,clock_source=internal,time_source=internal,initializing=True'. [WARNING] [UDP] The send buffer could not be resized sufficiently. Target sock buff size: 2500000 bytes. Actual sock buff size: 1048576 bytes. See the transport application notes on buffer resizing. Please run: sudo sysctl -w net.core.wmem_max=2500000 [ERROR] [RFNOC::GRAPH] Caught exception while initializing graph: RfnocError: OpTimeout: Control operation timed out waiting for ACK Error: RuntimeError: Failure to create rfnoc_graph. I know that this is not an error due to the uhd installation because I have purchased another one ettus x440 device and the output obtained with the same command is completely different: [INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107800; UHD_4.8.0.0-0-g308126a4 [INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=127.0.0.1,type=x4xx,product=x440,serial=34B2ACC,name=ni-x4xx-34B2ACC,fpga=X4_400,claimed=False [INFO] [MPM.PeriphManager] init() called with device args `fpga=X4_400,mgmt_addr=127.0.0.1,name=ni-x4xx-34B2ACC,product=x440,clock_source=internal,time_source=internal,initializing=True'. _____________________________________________________ / | Device: X400-Series Device | _____________________________________________________ | / | | Mboard: ni-x4xx-34B2ACC | | module_pid: 42048 | | module_rev: 4 | | module_serial: 34B2ACC | | pid: 1088 | | rev: 6 | | rev_compat: 6 | | serial: 345A6FE | | MPM Version: 5.3 | | FPGA Version: 8.3 | | FPGA git hash: 8e780be.clean | | Device DNA: 40020000017166A5242062C5 | | RFNoC capable: Yes | | | | Time sources: internal, external, qsfp0, gpsdo | | Clock sources: mboard, internal, external, nsync, gpsdo | | Sensors: ref_locked, fan0, fan1, temp_fpga, temp_main_power0, temp_main_power1, temp_scu_internal, temp_sample_clock_pcb, temp_dram_pcb, temp_tmp464_internal, temp_power_supply_pcb, gps_alarm, gps_enabled, gps_gpgga, gps_locked, gps_phase_lock, gps_sky, gps_survey, gps_time, gps_tpv, gps_warmup | _____________________________________________________ | / | | RFNoC blocks on this device: | | | | * 0/Radio#0 | | * 0/Radio#1 | | * 0/Replay#0 | | * 0/Replay#1 | _____________________________________________________ | / | | Static connections on this device: | | | | * 0/SEP#0:0==>0/Radio#0:0 | | * 0/Radio#0:0==>0/SEP#0:0 | | * 0/SEP#1:0==>0/Radio#0:1 | | * 0/Radio#0:1==>0/SEP#1:0 | | * 0/SEP#2:0==>0/Radio#0:2 | | * 0/Radio#0:2==>0/SEP#2:0 | | * 0/SEP#3:0==>0/Radio#0:3 | | * 0/Radio#0:3==>0/SEP#3:0 | | * 0/SEP#4:0==>0/Radio#1:0 | | * 0/Radio#1:0==>0/SEP#4:0 | | * 0/SEP#5:0==>0/Radio#1:1 | | * 0/Radio#1:1==>0/SEP#5:0 | | * 0/SEP#6:0==>0/Radio#1:2 | | * 0/Radio#1:2==>0/SEP#6:0 | | * 0/SEP#7:0==>0/Radio#1:3 | | * 0/Radio#1:3==>0/SEP#7:0 | | * 0/SEP#8:0==>0/Replay#0:0 | | * 0/Replay#0:0==>0/SEP#8:0 | | * 0/SEP#9:0==>0/Replay#0:1 | | * 0/Replay#0:1==>0/SEP#9:0 | | * 0/SEP#10:0==>0/Replay#0:2 | | * 0/Replay#0:2==>0/SEP#10:0 | | * 0/SEP#11:0==>0/Replay#0:3 | | * 0/Replay#0:3==>0/SEP#11:0 | | * 0/SEP#12:0==>0/Replay#1:0 | | * 0/Replay#1:0==>0/SEP#12:0 | | * 0/SEP#13:0==>0/Replay#1:1 | | * 0/Replay#1:1==>0/SEP#13:0 | | * 0/SEP#14:0==>0/Replay#1:2 | | * 0/Replay#1:2==>0/SEP#14:0 | | * 0/SEP#15:0==>0/Replay#1:3 | | * 0/Replay#1:3==>0/SEP#15:0 | _____________________________________________________ | / | | TX Dboard: 0/Radio#0 | | _____________________________________________________ | | / | | | TX Frontend: 0 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | TX Frontend: 1 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | TX Frontend: 2 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | TX Frontend: 3 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0__________________________ | | / | | | RX Frontend: 3 | | | Name: FBX | | | Antennas: TX/RX0, RX1, SYNC_INT, SYNC_EXT, CAL_LOOPBACK, TERM | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | _____________________________________________________ | / | | TX Dboard: 0/Radio#1 | | _____________________________________________________ | | / | | | TX Frontend: 0 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | TX Frontend: 1 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | TX Frontend: 2 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | TX Frontend: 3 | | | Name: FBX | | | Antennas: TX/RX0, CAL_LOOPBACK | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | _____________________________________________________ | / | | RX Dboard: 0/Radio#1 | | _____________________________________________________ | | / | | | RX Frontend: 0 | | | Name: FBX | | | Antennas: TX/RX0, RX1, SYNC_INT, SYNC_EXT, CAL_LOOPBACK, TERM | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | RX Frontend: 1 | | | Name: FBX | | | Antennas: TX/RX0, RX1, SYNC_INT, SYNC_EXT, CAL_LOOPBACK, TERM | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | RX Frontend: 2 | | | Name: FBX | | | Antennas: TX/RX0, RX1, SYNC_INT, SYNC_EXT, CAL_LOOPBACK, TERM | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No | | _____________________________________________________ | | / | | | RX Frontend: 3 | | | Name: FBX | | | Antennas: TX/RX0, RX1, SYNC_INT, SYNC_EXT, CAL_LOOPBACK, TERM | | | Sensors: temperature, rfdc_rate, lo_locked, nco_locked | | | Freq range: 1.000 to 4000.000 MHz | | | Gain range all: 0.0 to 0.0 step 0.0 dB | | | Bandwidth range: 1600000000.0 to 1600000000.0 step 0.0 Hz | | | Connection Type: IQ | | | Uses LO offset: No Do you have any idea of what is happening or could you help me to fix the error? Thank you all!!!
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