# Error importing GNU Radio's wxgui using gnuradio v3.7.7 **URL:** \ **Category:** GNU Radio\ **Created:** [June 29, 2015, 11:59pm UTC](https://www.ruby-forum.com/t/error-importing-gnu-radios-wxgui-using-gnuradio-v3-7-7/242516 "2015-06-29T23:59:55Z")\ **Posts on this page:** 3\ **Page:** 1
**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 29, 2015, 11:59pm UTC](https://www.ruby-forum.com/t/error-importing-gnu-radios-wxgui-using-gnuradio-v3-7-7/242516/1 "2015-06-29T23:59:55Z")
Hi all, I’m new to GNU Radio and relatively new to Linux. I’m using UHD v3.8.4 for a USRP N210 on Ubuntu 14.04 LTS and wanted to begin using GNU Radio with UHD. I followed the install guide for installing UHD and GNU Radio from source (I installed GNU v3.7.7 from github). I did have to export PYTHONPATH and LD\_LIBRARY\_PATH environment variables and added those export statements to bashrc so that I could run grc. I verified that grc opens with gnuradio-companion. When trying to run uhd\_fft, I get the error “Error importing GNU Radio’s wxgui. Please make sure gr-wxgui is installed.” I investigated this further and discovered that this was a known bug for GNU Radio v3.7.2, but was fixed in 3.7.3. I looked through several threads, including the following: [https://nuand.com/forums/viewtopic.php?f=4&t=3502](https://nuand.com/forums/viewtopic.php?f=4&t=3502) They suggested looking to ensure wxgui was actually installed, and if so, then I may have misconfigured some library path or python path. I looked for wxgui on my computer and found the source/python files in the git repo on my computer, but nowhere in any install directory. I reran sudo make install from the build directory of my gnuradio repo and sent the output to a log file, which I have attached. Looking through the log file, I see plenty of wxgui xml and html files in the install directories, but no record of adding any python files to the install directories. I’m honestly not sure what I’m doing wrong, but I’m sure it is a beginner mistake. I suspect it may have a something to do with a problem I encountered during installation and was unable to fix: although when running make all the source files built successfully, when running make-test I encountered one error: 194 - qa\_zeromq\_pub (Failed) I reran make test and printed the log to a file I called ctest\_log\_file. Here is part of the output: # 194/197 Test #194: qa\_zeromq\_pub …\*\*\*Failed 0.19 sec E ## ERROR: test\_001 ( **main**.qa\_zeromq\_pub) Traceback (most recent call last): File “/home/prometheus/gnuradio\_workspace/gnuradio/gr-zeromq/python/zeromq/qa\_zeromq\_pub.py”, line 47, in test\_001 self.assertFloatTuplesAlmostEqual(self.rx\_data, src\_data) File “/home/prometheus/gnuradio\_workspace/gnuradio/gnuradio-runtime/python/gnuradio/gr\_unittest.py”, line 88, in assertFloatTuplesAlmostEqual self.assertEqual (len(a), len(b)) TypeError: object of type ‘NoneType’ has no len() * * * Ran 1 test in 0.003s FAILED (errors=1) Do any of you have ideas of what I did wrong? What more can I do to find the problem? I appreciate your help very much. Regards, Marshall ---
**Author:** ![GareyS\_Marshall\_O](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/7ab992/32.png) [@GareyS\_Marshall\_O](https://www.ruby-forum.com/u/GareyS_Marshall_O)\ **Post date:** [July 2, 2015, 12:55am UTC](https://www.ruby-forum.com/t/error-importing-gnu-radios-wxgui-using-gnuradio-v3-7-7/242516/2 "2015-07-02T00:55:42Z")
On Mon, Jun 29, 2015 at 5:10 PM, Garey, Marshall O. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Radio v3.7.2, but was fixed in 3.7.3. I looked through several threads, > > ``` > self.assertFloatTuplesAlmostEqual(self.rx_data, src_data) > > ``` > > Do any of you have ideas of what I did wrong? What more can I do to find > the problem? I appreciate your help very much. > Regards, > Marshall Marshall, The ZMQ QA tests have been a bit flaky since they were introduced, and seem to particularly hit Ubuntu 14.04. I recommend ignoring them and moving on – this will have nothing to do with WXGUI. Tom ---
**Author:** ![GareyS\_Marshall\_O](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/7ab992/32.png) [@GareyS\_Marshall\_O](https://www.ruby-forum.com/u/GareyS_Marshall_O)\ **Post date:** [July 2, 2015, 1:50am UTC](https://www.ruby-forum.com/t/error-importing-gnu-radios-wxgui-using-gnuradio-v3-7-7/242516/3 "2015-07-02T01:50:01Z")
Thanks for the reply, Tom. I won’t worry about that error, then. * * * From: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [removed\_email\_address@domain.invalid] on behalf of Tom Rondeau [removed\_email\_address@domain.invalid] Sent: Wednesday, July 01, 2015 4:29 PM To: Garey, Marshall O. Cc: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Subject: Re: [Discuss-gnuradio] Error importing GNU Radio’s wxgui… using gnuradio v3.7.7 On Mon, Jun 29, 2015 at 5:10 PM, Garey, Marshall O. \<[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: Hi all, I’m new to GNU Radio and relatively new to Linux. I’m using UHD v3.8.4 for a USRP N210 on Ubuntu 14.04 LTS and wanted to begin using GNU Radio with UHD. I followed the install guide for installing UHD and GNU Radio from source (I installed GNU v3.7.7 from github). I did have to export PYTHONPATH and LD\_LIBRARY\_PATH environment variables and added those export statements to bashrc so that I could run grc. I verified that grc opens with gnuradio-companion. When trying to run uhd\_fft, I get the error “Error importing GNU Radio’s wxgui. Please make sure gr-wxgui is installed.” I investigated this further and discovered that this was a known bug for GNU Radio v3.7.2, but was fixed in 3.7.3. I looked through several threads, including the following: [Error importing GNU Radio's wxgui. Please make sure ,, - Official bladeRF forum](https://nuand.com/forums/viewtopic.php?f=4&t=3502) They suggested looking to ensure wxgui was actually installed, and if so, then I may have misconfigured some library path or python path. I looked for wxgui on my computer and found the source/python files in the git repo on my computer, but nowhere in any install directory. I reran sudo make install from the build directory of my gnuradio repo and sent the output to a log file, which I have attached. Looking through the log file, I see plenty of wxgui xml and html files in the install directories, but no record of adding any python files to the install directories. I’m honestly not sure what I’m doing wrong, but I’m sure it is a beginner mistake. I suspect it may have a something to do with a problem I encountered during installation and was unable to fix: although when running make all the source files built successfully, when running make-test I encountered one error: 194 - qa\_zeromq\_pub (Failed) I reran make test and printed the log to a file I called ctest\_log\_file. Here is part of the output: # 194/197 Test #194: qa\_zeromq\_pub …\*\*\*Failed 0.19 sec E ## ERROR: test\_001 ( **main**.qa\_zeromq\_pub) Traceback (most recent call last): File “/home/prometheus/gnuradio\_workspace/gnuradio/gr-zeromq/python/zeromq/qa\_zeromq\_pub.py”, line 47, in test\_001 self.assertFloatTuplesAlmostEqual(self.rx\_data, src\_data) File “/home/prometheus/gnuradio\_workspace/gnuradio/gnuradio-runtime/python/gnuradio/gr\_unittest.py”, line 88, in assertFloatTuplesAlmostEqual self.assertEqual (len(a), len(b)) TypeError: object of type ‘NoneType’ has no len() * * * Ran 1 test in 0.003s FAILED (errors=1) Do any of you have ideas of what I did wrong? What more can I do to find the problem? I appreciate your help very much. Regards, Marshall Marshall, The ZMQ QA tests have been a bit flaky since they were introduced, and seem to particularly hit Ubuntu 14.04. I recommend ignoring them and moving on – this will have nothing to do with WXGUI. Tom