Re: gr-tutorial error

[Wojciech Kazubski]

> Good afternoon,
> 
> I am working on the tutorial for creating My QPSK Demodulator block and it
> seems that I have run into an error when I execute the flow graph. The
> error:
> Traceback (most recent call last):
>   File "/home/mariom/gr-tutorial/build/top_block.py", line 191, in <module>
>     main()
>   File "/home/mariom/gr-tutorial/build/top_block.py", line 167, in main
>     tb = top_block_cls()
>   File "/home/mariom/gr-tutorial/build/top_block.py", line 82, in __init__
>     self.tutorial_my_qpsk_demod_cb_0 = tutorial.my_qpsk_demod_cb(True)
> AttributeError: module 'tutorial' has no attribute 'my_qpsk_demod_cb'
> 
> In case you in the link for the tutorial here it is: Click here
> <https://wiki.gnuradio.org/index.php/Guided_Tutorial_GNU_Radio_in_C%2B%2B>
> 
> I have been looking at the My QPSK Demodulator code blocks to see if there
> was something I missed but it does not seem so. I'm using Ubuntu 20.04.3
> LTS and I downloaded Gnuradio 3.8.4.0. I'm not sure where to go after this.
> Any suggestions? Thank you for your time. Have a nice day.
> 
> -Mario Moran

Gr-tutorial is GR-3.7 only and will not build with version 3.8 or 3.9.
If you want to follow QPSK demodulation tutorial, there is a link to 
mpsk_stage6.grc flowgraph there that does not require My QPSK Demodulator 
block. 
-- 

Wojciech Kazubski