# Re: problem with ofdm link

**URL:** <https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346>\
**Category:** GNU Radio\
**Created:** [June 17, 2015, 10:50am UTC](https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346 "2015-06-17T10:50:31Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [June 17, 2015, 10:50am UTC](https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346/1 "2015-06-17T10:50:31Z")

</div>

* * *

Discuss-gnuradio mailing list  
removed\_email\_address@domain.invalid  
[https://lists.gnu.org/mailman/listinfo/discuss-gnuradio](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

---

<div class="post-metadata">

**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 17, 2015, 11:05am UTC](https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346/2 "2015-06-17T11:05:43Z")

</div>

Hi Alphonso,

On 06/17/2015 10:49 AM, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> some questions for error searching in general: is there a possibility  
> to pinpoint the exact block who causes the error? what do you mean  
> with “creating a stack trace”? are there pages/tutorials/papers to get  
> deeper into this?  
> Have a look at  
> [https://gnuradio.org/redmine/projects/gnuradio/wiki/TutorialsGDB](https://gnuradio.org/redmine/projects/gnuradio/wiki/TutorialsGDB)

Greetings,  
Marcus

---

<div class="post-metadata">

**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 17, 2015, 6:04pm UTC](https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346/3 "2015-06-17T18:04:00Z")

</div>

On 17.06.2015 01:49, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> done, too! i have tested each block and found out that the “ofdm carrier  
> allocator” block causes the error. i searched for that on the internet

Carrier allocator, huh? Interesting. That block is fairly simple. Can  
you post the exact configuration for that block?

M

---

<div class="post-metadata">

**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 18, 2015, 6:18pm UTC](https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346/4 "2015-06-18T18:18:05Z")

</div>

Your occupied carriers data structure is a vector, I believe it should  
be a vector of vectors (see the examples and the manual page). I guess  
with all the SWIGgery, this doesn’t get detected very early on.

M

---

<div class="post-metadata">

**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 18, 2015, 9:43am UTC](https://www.ruby-forum.com/t/re-problem-with-ofdm-link/242346/5 "2015-06-18T09:43:57Z")

</div>

* * *

Discuss-gnuradio mailing list  
removed\_email\_address@domain.invalid  
[https://lists.gnu.org/mailman/listinfo/discuss-gnuradio](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)