# Problem with ofdm link

**URL:** <https://www.ruby-forum.com/t/problem-with-ofdm-link/242254>\
**Category:** GNU Radio\
**Created:** [June 9, 2015, 3:42pm UTC](https://www.ruby-forum.com/t/problem-with-ofdm-link/242254 "2015-06-09T15:42:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [June 9, 2015, 3:42pm UTC](https://www.ruby-forum.com/t/problem-with-ofdm-link/242254/1 "2015-06-09T15:42:13Z")

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[https://lists.gnu.org/mailman/listinfo/discuss-gnuradio](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

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**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [June 9, 2015, 6:32pm UTC](https://www.ruby-forum.com/t/problem-with-ofdm-link/242254/2 "2015-06-09T18:32:49Z")

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On 09.06.2015 06:40, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> pl,byte0, byte1,…,byte5 or 6,byte0,byte1,…,byte5?  
> Have a look at the manual page for ‘tagged streams’. That should clear  
> things up.

> 1. when i simulate the entire graph i get the following error message:
> 
> using volk machine: sse3\_64\_orc  
> floating point exception
> 
> any idea why? the my\_qpsk\_demod\_cb block works perfect. it is from the  
> guided tutorials 3+4 and tested.

No way to tell! Try creating a stack trace, or narrowing down which  
block is triggering this.

Cheers,  
Martin