> 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
