Hi Christophe and Marcus, Thank you for the reply. I tried the fm_tx_2.grc and it has the same error message as below. ======= Block: pfb_arb_resampler_xxx_0 Aspect: Param 'Taps' Message: Expression None is invalid for type'real_vector'. ======= Also the files between master and maint-3.9 are identical. "git diff maint-3.9 master gr-analog/examples/fm_?x.grc"
I don't think I had a previous version of GNU Radio before. I installed GNU Radio from the binary package. I tried to delete the cache file and the cache folder then restart GRC but it is the same. Any other suggestions? Best regards, Clark On Fri, Apr 9, 2021 at 9:19 AM Christophe Seguinot < christophe.segui...@orange.fr> wrote: > Hi Clark > > I'm running under Ubuntu 20.04 and GNURadio 3.9 fresh install (my Computer > and HDD were out for several days an I had to reinstall Linux) > > I downloaded maint-3.8 fm_tx.grc and fm_rx.grc. They worked at the first > run without any problem. (I only had to remove > ~/.cache/grc_gnuradio/cache.json cahce file because I previously used > another version of GR on this computer) > > I attached my fm_tx_2.grc file (the downloaded one, renamed and > runned/saved under GR3.9) > > 1. try to run this .grc file. > 2. if it run, can you send your file to see where the issue come from? > 3. if it doesn't run .. ?? > > Regards Christophe > On 08/04/2021 21:24, Clark Chiu wrote: > > Btw, I am using Ubuntu 18.04 > > On Wed, Apr 7, 2021 at 11:39 PM Clark Chiu <clark...@gmail.com> wrote: > >> Hi Marcus, >> >> I am using 3.9 for the GNU Radio. I ran the example from the latest >> master branch of github. I see from the CHANGELOG.md it should be the same >> 3.9 right? >> Thanks. >> >> Best regards, >> Kuan-lin >> >> On Wed, Apr 7, 2021 at 7:12 PM Marcus Müller <muel...@kit.edu> wrote: >> >>> Hi Clark, >>> >>> which version of GNU Radio are you using, and is the folder from which >>> you're taking these >>> examples from the same version? >>> >>> Thank you for your answer! >>> Marcus >>> >>> On 07.04.21 23:35, Clark Chiu wrote: >>> > Hello, >>> > >>> > I am new to GNU Radio and I am trying to understand more by checking >>> the fm_rx and fm_tx >>> > examples in the gnuradio/gr-analog/examples folder. I open these two >>> grc files from the >>> > GNU Radio Companion. Out of box, there is an error message in >>> Polyphase Arbitrary >>> > Resampler saying Expression None is invalid for type `real_vector` of >>> parameter `Taps`. I >>> > tried to google around the forum and the internet but I couldn't find >>> anything useful to >>> > fix this. I doubt it has something to do with the last parameter >>> "window.WIN_KAISER" but I >>> > am not sure. >>> > >>> > Could anyone give me some pointers? >>> > Thank you in advance. >>> > >>> > >>> > Best regards, >>> > Clark >>> >>>
