Hi Rubén, You say that you have basically done the same on both devices. But what strikes me: In the erroneous device your printout looks like this:
[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 However, in the good device it looks like this: [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 That indicates that there is something different between those devices. The bad one uses the external address which is surprising because if I run uhd_usrp_probe locally on my device it will not even work with the external addresses but only with the loopback device address 127.0.0.1 (or `localhost`). What is the argument string that you used for the two devices? Anything at all or did UHD pick this automatically (it might have had reasons…)? Please try to login to the device via SSH or serial console and run `uhd_usrp_probe --args addr=127.0.0.1` to see what it looks like then. If that works on the currently erroneous device then it boils down to something in the network configuration. When running this on a remote host, however, it must work with the external-facing IP address of the device, though, no question, if the IP configuration is okay. /Martin From: Rubén Serrano via USRP-users <[email protected]> Sent: Thursday, August 21, 2025 4:39 PM To: [email protected] Subject: [EXTERNAL] [USRP-users] Re: Error with ettus x440: Failure to create rfnoc_graph. Hi Martin, · Yes, the output on the erroneous device has been generated by running that command when i am logged into the device via SSH. · I have checked the Ip configurations, which they are 192.168.0.3 for the good device, 192.168.0.4 for the erroneous, 192.168.0.10 for the host (which only have 1 because i plugged and unplugged the devices so they have been tested separately) and DHCP 192.168.0.255. · Also the subnet and subnet mask are configurated the same for all the network (ettus devices and host). I am going to check out the manual that you send to me via link and see if i have set up anything wrong. Also in my first tries to make the devices run, I have configured the set up as you remarked in the reply, but suddenly when all goes wrong I only have tested the devices with the RJ45 connection. I will try to let the configuration as you recommended, but when i did i had the same issue. Thank you so much for the quick reply.
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