> From: Nikoloz Glonti <n...@glonti.com> > To: "discuss-gnuradio@gnu.org" <discuss-gnuradio@gnu.org> > Cc: > Bcc: > Date: Thu, 26 May 2022 17:11:50 +0200 > Subject: Getting "referenced unknown base type gr::block" > Hi everyone, > > I have newest gnuradio 3.10, and I'm compiling example QPSK block - > https://wiki.gnuradio.org/index.php?title=Guided_Tutorial_GNU_Radio_in_C%2B%2B <https://wiki.gnuradio.org/index.php?title=Guided_Tutorial_GNU_Radio_in_C%2B%2B> > But when trying to run it i get following error. > > File > "/home/ng/Desktop/bloczki/gr-spektralsi/build/python/testFiltru.py", > line 35, in <module> > from gnuradio import pec > File > "/usr/local/lib/python3.10/site-packages/gnuradio/pec/__init__.py", line > 18, in <module> > from .pec_python import * > ImportError: generic_type: type "qpsk_demod_cb" referenced unknown base > type "gr::block" > > How can i fix it? > > Thank You in advance > Niko
My experience is that this is commonly caused by pybind11-dev version incompatibility. At least version 2.5.0 is needed. Ubuntu 20.04 provides version 2.4.3 and I have not been successful in updating to a later version on that specific OS release. Ubuntu 22.04 provides more recent versions of a bunch of tools, and for me that was what was needed. -- Tom, N5EG
