# Gr-lte errors

**URL:** <https://www.ruby-forum.com/t/gr-lte-errors/230709>\
**Category:** GNU Radio\
**Created:** [June 30, 2014, 9:12pm UTC](https://www.ruby-forum.com/t/gr-lte-errors/230709 "2014-06-30T21:12:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [June 30, 2014, 9:12pm UTC](https://www.ruby-forum.com/t/gr-lte-errors/230709/1 "2014-06-30T21:12:47Z")

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Hi,

I downloaded the GNU RADIO LTE receiver code and followed the  
instructions to install it, but unfortunately I couldn’t make it work.

In these four example files I get the following errors:

[http://pastie.org/9341276](http://pastie.org/9341276)

I’ve also tried with the python script hier\_block\_install\_helper.py,  
with this output:

[http://pastie.org/9341288](http://pastie.org/9341288)

I’m using gnu-radio 3.7.2.1, and downloaded the LTE receiver code today,  
so I guess it’s the latest version. Thanks!

Gabriel

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**Author:** ![Gabriel\_TolS\_n](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/848f3c/32.png) [@Gabriel\_TolS\_n](https://www.ruby-forum.com/u/Gabriel_TolS_n)\
**Post date:** [June 30, 2014, 11:07pm UTC](https://www.ruby-forum.com/t/gr-lte-errors/230709/2 "2014-06-30T23:07:45Z")

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Hi!  
The errors look like python can’t find the LTE module; have you made  
sure you’ve installed that?

With best regards,  
Marcus M.

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**Author:** ![Gabriel\_TolS\_n](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/848f3c/32.png) [@Gabriel\_TolS\_n](https://www.ruby-forum.com/u/Gabriel_TolS_n)\
**Post date:** [July 1, 2014, 1:45pm UTC](https://www.ruby-forum.com/t/gr-lte-errors/230709/3 "2014-07-01T13:45:31Z")

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Hi Marcus, thanks for your answer.

I’ve uninstalled the gr-lte code and installed it again, with same  
results. When the code wasn’t installed, I couldn’t generate any of the  
flow graphs, on the other hand, with the code installed I can generate  
all the examples except that mentioned.

In the case of decode\_pbch\_37, if I connect the QPSK soft demode with  
the pad sink, and change the Vec length of the last, I can generate it,  
but maybe It makes no sense.

Regards

Gabriel

El 30/06/14 18:05, Marcus M. escribi:

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**Author:** ![Gabriel\_TolS\_n](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/848f3c/32.png) [@Gabriel\_TolS\_n](https://www.ruby-forum.com/u/Gabriel_TolS_n)\
**Post date:** [July 2, 2014, 3:16pm UTC](https://www.ruby-forum.com/t/gr-lte-errors/230709/4 "2014-07-02T15:16:44Z")

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Finally, I updated the gnu-radio, and following the instructions for  
gr-lte again it worked. I had installed gnu-radio from sources, so I  
just updated it with git. Thanks!

Gabriel

El 01/07/14 08:44, Gabriel Toln escribi: