Hi Jeff thank you! it's work for me by removing cache.json Now gnuradio flow graph run just fine.
BR David Il giorno sab 17 apr 2021 alle ore 12:57 Jeff Long <[email protected]> ha scritto: > The first thing to try is > - quit GRC > - rm ~/.cache/grc_gnuradio/cache.json > - start GRC > - reselect the signal type in the signal source block (or delete and > re-add the block) > > If that does not work, you might want to try a more recent version of 3.9, > installed from the PPA ppa:gnuradio/gnuradio-maint-3.9. > > On Sat, Apr 17, 2021 at 2:17 AM David Martini <[email protected]> > wrote: > >> Hi all, >> >> I upgrade the system to ubuntu 20.04 starting from iso. >> Then I install GNURADIO 3.9.0.0 following the instruction in the wiki. >> GNU radio is correctly installed because I'm able to run >> successfully top_block.py but I have problems building the flowgraf. >> In attached picture of the error that I get : waveforms generator don't >> show frequency (even do in block editor is correctly assigned). >> Of course I'm not able to generate any topblock. >> I try to re-install gnuradio but get same error. >> On internet I found some indication that the problem can be in grc.conf >> file global_block_patch but not working on my cases. >> >> Thank you for help. >> >> David >> >>
