AttributeError: 'module' object has no attribute 'ldpc_decoder_cb'

[SunaRiver]

AttributeError: 'module' object has no attribute 'ldpc_decoder_cb' I found this error when run this, please help.

[drmpeg]

How did you install GNU Radio? You have to install gr-dvbs2rx into the same directory that you installed GNU Radio.

If you used apt-get to install, then GNU Radio is in /usr. To install gr-dvbs2rx into /usr, you have to set an install prefix with cmake. Like so:

cmake -DCMAKE_INSTALL_PREFIX=/usr

[TheNageek]

I'm getting a similar error with dvbs2rx module, "ImportError: No module named dvbs2rx". I believe the solution is as you've mentioned with installation/pathing.

Note, I'm currently on a Windows 10 machine and GRC is installed at,

C:\Program Files\GNURadio-3.7

Does that mean I should place the gr-dvbs2rx at,

C:\Program Files\GNURadio-3.7\gr-dvbs2rx

I've tried placing it in a few different places without success. Let me know if you have any thoughts.

[drmpeg]

I can't say I know anything about Windows installs. I would think C:\Program Files\GNURadio-3.7 would be the correct install directory.

[AlexeyMyslivets]

I have the same error: AttributeError: 'module' object has no attribute 'ldpc_decoder_cb' I do as described above. Here are my steps:

git clone https://github.com/drmpeg/gr-dvbs2rx cd gr-dvbs2rx cmake -DCMAKE_INSTALL_PREFIX=/usr make sudo make install sudo ldconfig

I use : Ubuntu 18.04.3 LTS GNU Radio Companion 3.7.11

Where is the mistake ?

[drmpeg]

You need to use a build directory.

git clone https://github.com/drmpeg/gr-dvbs2rx cd gr-dvbs2rx mkdir build cd build cmake -DCMAKE_INSTALL_PREFIX=/usr ../ make sudo make install sudo ldconfig

[AlexeyMyslivets]

Here is the result :

git clone https://github.com/drmpeg/gr-dvbs2rx cd gr-dvbs2rx mkdir build cd build cmake -DCMAKE_INSTALL_PREFIX=/usr ../ make make: *** No targets specified and no makefile found. Stop.

[luvBuzz]

I'm getting the same error on Ubuntu 18.04 LTS and Arch Linux. -GNURadio 3.8.1.0 -Branch: maint-3.8

Location of GNURadio-companion is: /usr/bin/gnuradio-companion

I used cmake -DCMAKE_INSTALL_PREFIX=/usr ../ for installation. Whenever I start or execute the flowgraph I get AttributeError: module 'dvbs2rx' has no attribute 'ldpc_decoder_cb'

I'm stuck right now and happy about every hint in the right direction.

[FJTor]

Hey guys I had the same issue, has anyone solved it?

I managed to make dvbs2rx work by installing gnuradio 3.8 from source at /usr/local, same as dvbs2rx and everything works fine...

However, I need to run this code on a single processor core with python multiprocessing library. For that reason I need gnuradio 3.8 installed as superuser at

/usr

Has anyone solved this for /usr? Thanks to all

[drmpeg]

@FJTor Have you tried cmake -DCMAKE_INSTALL_PREFIX=/usr ../ when building? That should work.

[FJTor]

Hi Ron,

First of all, thank you very much for your reply.

Yesterday afternoon I just solved superuser issue. Indeed, I tried

cmake -DCMAKE_INSTALL_PREFIX=/usr ../

The problem is that gnuradio installation does not include swig. Checking in the middle of cmake command output just found “no swig version found, so swig is skipped”. Once I apt-get install swig everything works fine.

My project aims to make a 512kbps modem, so It could fit. When trying for a lower bitrate and reading Igor’s github project I will inform you with progress.

Thank you again and regards Fran

De: Ron Economos @.> Enviado el: miércoles, 8 de junio de 2022 23:28 Para: drmpeg/gr-dvbs2rx @.> CC: Francisco Javier Toral @.>; Mention @.> Asunto: Re: [drmpeg/gr-dvbs2rx] AttributeError: 'module' object has no attribute 'ldpc_decoder_cb' (#7)

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@FJTorhttps://github.com/FJTor Have you tried cmake -DCMAKE_INSTALL_PREFIX=/usr ../ when building. That should work.

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