# GRC not working with B200, cannot locate firmware

**URL:** <https://www.ruby-forum.com/t/grc-not-working-with-b200-cannot-locate-firmware/229978>\
**Category:** GNU Radio\
**Created:** [May 25, 2014, 3:26am UTC](https://www.ruby-forum.com/t/grc-not-working-with-b200-cannot-locate-firmware/229978 "2014-05-25T03:26:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [May 25, 2014, 3:26am UTC](https://www.ruby-forum.com/t/grc-not-working-with-b200-cannot-locate-firmware/229978/1 "2014-05-25T03:26:18Z")

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I cannot get GRC to work with my B200.

I have performed the steps here:  
[http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD\_Build](http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD_Build)

Any suggestions?

Thanks

* * *

Using Volk machine: sse4\_2\_64

UHD Warning:  
Could not locate B200 firmware.  
Please install the images package. Please run:  
sudo “/usr/local/lib/uhd/utils/uhd\_images\_downloader.py”  
Traceback (most recent call last):  
File “/home/user/GRC Files/top\_block.py”, line 152, in   
tb = top\_block()  
File “/home/user/GRC Files/top\_block.py”, line 89, in **init**  
channels=range(1),  
File “/usr/lib/python2.7/dist-packages/gnuradio/uhd/ **init**.py”, line  
122, in constructor\_interceptor  
return old\_constructor(\*args)  
File “/usr/lib/python2.7/dist-packages/gnuradio/uhd/uhd\_swig.py”, line  
1719, in make  
return \_uhd\_swig.usrp\_source\_make(\*args)  
RuntimeError: LookupError: KeyError: No devices found for -----\>  
Empty Device Address

> > > Done

* * *

---

<div class="post-metadata">

**Author:** ![imzack](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/2bfe46/32.png) [@imzack](https://www.ruby-forum.com/u/imzack)\
**Post date:** [May 25, 2014, 8:50pm UTC](https://www.ruby-forum.com/t/grc-not-working-with-b200-cannot-locate-firmware/229978/2 "2014-05-25T20:50:25Z")

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Any suggestions?

The program knows that I have a B200 plugged in, just isn’t linking to  
the firmware I suppose.

I have been struggling with this problem for some time now.

Any help would be much appreciated!