Hi!\ \ We were working with UHD 4.1 and Ubuntu 22, but we wanted to upgrade the version to the 4.8. However, we keep encountering this error all the time and are unsure why. \ \ The new version does not allow to use commands that previously worked. This force us to downgrade the uhd version to 4.1. We also tried 4.5, but the same problem. \ \ If anyone can help us troubleshoot this problem, I would really appreciate it! Best regards,\ Álvaro\ \ 

Hi Álvaro, You should check the UHD version on the x4xx device itself and make sure it matches the UHD version on the host OS. I am guessing the UHD version on the x4xx device is 4.1.0.0 that is why having the same version of the host OS works but other versions aren't working. If the x4xx still have the 4.1.0.0 version, you may consider updating the x4xx file system so that both UHD on x4xx and host are the same. I hope this helps. Best, Joshua Graduate Student, Department of Electrical and Computer Engineering, Iowa State University, Ames, IA. ________________________________ From: ardelgado@gradiant.org <ardelgado@gradiant.org> Sent: Sunday, March 2, 2025 9:16:19 AM To: usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> Subject: [USRP-users] Issue Upgrading UHD from 4.1 to 4.8 : [Error][MPDM] MPM major compat number missmatch Hi! We were working with UHD 4.1 and Ubuntu 22, but we wanted to upgrade the version to the 4.8. However, we keep encountering this error all the time and are unsure why. The new version does not allow to use commands that previously worked. This force us to downgrade the uhd version to 4.1. We also tried 4.5, but the same problem. If anyone can help us troubleshoot this problem, I would really appreciate it! Best regards, Álvaro [cid:b43109ce6968d9072e2d1ac21493c337@phpmailer.0]

See here for instructions on how to update the filesystem on the device to the one that matches your UHD version. https://kb.ettus.com/USRP_X410/X440_Getting_Started_Guide#Updating_Filesystems Wade On Sun, Mar 2, 2025 at 3:18 PM Ofori Boateng, Joshua [E CPE] via USRP-users <usrp-users@lists.ettus.com> wrote: > Hi Álvaro, > > You should check the UHD version on the x4xx device itself and make sure > it matches the UHD version on the host OS. > I am guessing the UHD version on the x4xx device is 4.1.0.0 that is why > having the same version of the host OS works but other versions aren't > working. > If the x4xx still have the 4.1.0.0 version, you may consider updating the > x4xx file system so that both UHD on x4xx and host are the same. > > I hope this helps. > > > Best, > Joshua > > Graduate Student, > Department of Electrical and Computer Engineering, > Iowa State University, > Ames, IA. > ------------------------------ > *From:* ardelgado@gradiant.org <ardelgado@gradiant.org> > *Sent:* Sunday, March 2, 2025 9:16:19 AM > *To:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com> > *Subject:* [USRP-users] Issue Upgrading UHD from 4.1 to 4.8 : > [Error][MPDM] MPM major compat number missmatch > > > Hi! > > We were working with UHD 4.1 and Ubuntu 22, but we wanted to upgrade the > version to the 4.8. However, we keep encountering this error all the time > and are unsure why. > > The new version does not allow to use commands that previously worked. > This force us to downgrade the uhd version to 4.1. We also tried 4.5, but > the same problem. > > If anyone can help us troubleshoot this problem, I would really appreciate > it! > > Best regards, > Álvaro > > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-leave@lists.ettus.com >