Re: [Discuss-gnuradio] error with running wifi_loopback.grc from gr-ieee802-11

[Tian Alvin]

Hi Bastian,

I followed the suggestion on github:

Use

"std::string temp = (boost::format("encoding: %1% - length: %2% - symbols: %3%")
% d_encoding % d_len % d_copy_symbols).str();
//mylog(temp);"

to change : in the ofdm_decode_signal.cc# L197&L198
"mylog(boost::format("encoding: %1% - length: %2% - symbols: %3%")
% d_encoding % d_len % d_copy_symbols);"

Now I can get the below result:

Does this mean the flow graph has been run correctly? 

Paul----Thank you very much for your suggestion and sharing!

On Thu, Aug 13, 2015 at 1:59 PM, Bastian Bloessl <address@hidden> wrote:

Hi,

I just replied on github

https://github.com/bastibl/gr-ieee802-11/issues/18#issuecomment-130651522

It would be great if you could try what I suggest there.

Best,
Bastian

On 08/13/2015 02:32 PM, Garver, Paul W wrote:

Make sure logging is disabled on ALL blocks. I haven't seen that
libstdcxx error before, but I do have the segfaults with the logging in
Ubuntu 15.04 with pybombs install.

Paul Garver


On Aug 13, 2015, at 7:33 AM, Tian Alvin <address@hidden
<mailto:address@hidden>> wrote:

Hi Paul,

Thanks very much for your help! I have disabled logging and debug in
OFDM Parse MAC block, but the error is still there.

Did you also see the below error in your case when (gdb) run
wifi_loopback.py?
<image.png>
ImportError: No module named 'libstdcxx'


Thanks


On Wed, Aug 12, 2015 at 9:07 PM, Paul Garver <address@hidden
<mailto:address@hidden>> wrote:

    Tian,

    Disable logging and debug in the GRC flowgraph.  See if this
    solves the problem. For reference, see [1].


    [1]
    https://lists.gnu.org/archive/html/discuss-gnuradio/2015-07/msg00289.html

    On 08/12/2015 01:23 PM, address@hidden
    <mailto:address@hidden> wrote:

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           (Tian Alvin)


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Dipl.-Inform. Bastian Bloessl
Distributed Embedded Systems
University of Paderborn, Germany
http://www.ccs-labs.org/~bloessl/