Re: [Discuss-gnuradio] "QAM Demod" error in GRC

[Ben Reynwar]

This is a bug.
In file gr-digital/grc/digital_qa_demod.xml the line
   gray_coded = $gray_coded
should be changed to
   mod_code = $mod_code


On Wed, Jun 13, 2012 at 7:56 AM, jiajue ou <address@hidden> wrote:
> Hi all,
>
> I’m using GRC and the simple flow graph(1) at receiver  is as follows:
>
> Usrp source---->qam demod---->file sink
>
>
>
> It works fine at first. However, when I tried to execute another similar
> flow graph(2) that was built before UPDATING GNURADIO from 3.5.0 to 3.6.0.
> an error occurs:
>
>
>
> Generating:”/home/azalea/exp/top_block.py”
>
>
>
> executing:”/home/azalea/exp/top_block.py”
>
>
>
> File :”/home/azalea/exp/top_block.py”, line 79
>
> Self.digital_qam_demod_0=----------->
>
>
>
> Syntax error: invalid syntax
>
> (I looked up the python file, line 79 and line 80 are:
>
> Self.digital_qam_demod_0=----------->
>
> Cannot find ‘gray_coded’: digital.qam.qam_demod(
>
> )
>
> Then, I return to the mentioned flow graph(1), same error again.
>
> I also tried to start a new flow graph or make/make install gnuradio, but in
> vain.
>
> I’m just confused. The flow graph(1) worked well even after updating
> gnuradio. After that and before the error I didn’t remove or modify any
> module in gnuradio.
>
> Thanks a lot!
>
>
>
> Best,
>
> Jia
>
>
>
>
>
>
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