Hi Saeid - The error shows that the version of UHD as installed isn't fully
compatible with the version of GR. GR 3.7.9.1 is quite old ... unless you
need that specific version of GR, I'd recommend uninstalling that GR and
installing 3.7.14.5 from source. There are install guides around for doing
this build on Ubuntu of various versions. Hope this is useful! - MLD
On Thu, Oct 10, 2019 at 6:40 PM Saeid Hashemi via USRP-users <
usrp-users@lists.ettus.com> wrote:
> Hello everyone,
>
> I've been having some problems running the uhd_fft function recently. I
> did a fresh install of Ubuntu 16.04, then installed gnuradio using the
> package manager. When I run uhd_fft this is what I get. Would anyone have
> an idea as to where the problem is?
>
> Thanks,
> Saeid
>
> nuc03@nuc03:~$ apt-show-versions gnuradio
> gnuradio:amd64/xenial 3.7.9.1-2ubuntu1 uptodate
>
>
> nuc03@nuc03:~$ uhd_fft
> Traceback (most recent call last):
> File "/usr/bin/uhd_fft", line 48, in <module>
> from gnuradio import uhd
> File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py", line
> 135, in <module>
> _prepare_uhd_swig()
> File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py", line
> 38, in _prepare_uhd_swig
> import uhd_swig
> File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line
> 28, in <module>
> _uhd_swig = swig_import_helper()
> File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line
> 24, in swig_import_helper
> _mod = imp.load_module('_uhd_swig', fp, pathname, description)
> ImportError: /usr/lib/python2.7/dist-packages/gnuradio/uhd/_
> uhd_swig.x86_64-linux-gnu.so: undefined symbol:
> _ZN3uhd11time_spec_t15get_system_timeEv
>
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>
--
Michael Dickens
Ettus Research Technical Support
Email: supp...@ettus.com
Web: https://ettus.com/
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