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[Discuss-gnuradio] Installation problem: Ubuntu 9.04-gnuradio binary 3.2

From: ingangout . civ9z
Subject: [Discuss-gnuradio] Installation problem: Ubuntu 9.04-gnuradio binary 3.2 package (recursion depth error)
Date: Tue, 08 Sep 2009 07:16:35 -0700

Following the advice at http://gnuradio.org/trac/wiki/UbuntuInstall, I 
installed the Jaunty version of the Ubuntu distro. on my PC and the , hoping 
for a clean installation of the gnuradio code in a Linux environment (gnuradio 
version 3.2.2-1, according to the synaptic code manager).  I am trying to get 
some UCLA IEEE 802.15.4 code running (at 
https://www.cgran.org/browser/projects/ucla_zigbee_phy/trunk).  Therefore, I 
also followed the installation instructions at: 
https://www.cgran.org/wiki/UCLAZigBee#HowToInstall.  However, after 
installation of all of these, when I try to run the dial tone python example 
(now located in 
/usr/local/gnuradio_r10495/gnuradio-examples/python/audio/dial_tone.py or the 
multi-tone examples, I get the following error:

python dial_tone.py 
Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
Python object' in <type 'exceptions.AttributeError'> ignored

If I run the oscilloscope example, I get the same error:

address@hidden:/usr/local/gnuradio_r10495/gr-utils/src/python$ ./usrp_oscope.py 
Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
Python object' in <type 'exceptions.AttributeError'> ignored

I get the same error when trying to run the UCLA code examples:

address@hidden:/usr/local/ucla_zigbee_phy/src/examples$ python cc2420_rxtest.py
Exception RuntimeError: 'maximum recursion depth exceeded while calling a 
Python object' in <type 'exceptions.AttributeError'> ignored
cordic_freq = 2.475G
data_rate =  2M
samples_per_symbol =  2
usrp_decim =  16
fs =  4M
Using RX d'board A: Flex 2400 Rx MIMO B
>>> gr_fir_fff: using SSE
802_15_4_pkt: waiting for packet

Interestingly, the gnuradio example programs and the UCLA program all appear to 
work(!). I hear tones for the gnuradio audio examples, see an oscilloscope with 
radio activity and I can detect some 802.15.4 beacons using the UCLA example.  

This error seems to have been observed before and to have been attributed to an 
incompatibility between the linux kernel version (my version is 2.6.28-11) and 
the specific version of Python (my version is 2.6).  e.g. 
http://www.mail-archive.com/address@hidden/msg17030.html. However, after a 
search of the forums and a google or two, I cannot see any information about 
resolving the issue.  Is this a problem that can be ignored safely?  

To get rid of the error or work around the problem, it seems to me that my 
possible options are: 
 . Find a different version of Ubuntu and/or gnuradio that are known to work 
together properly (building from a tarball maybe???). I also need versions that 
will also support the UCLA code
 . change my version of python (I have tried an altinstall of python2.5, but 
get a different set of errors).  This assumes that the Python version *is* in 
fact the issue.
 . get (more) help from the authors of the UCLA code about the compatible 
versions of UCLA and gnuradio software and/or the OS kernel and/or Python 
software that they are using in their labs
 . Review installation logs for potential problems that may have occurred 
during installation (are the logs for any of these installation processes 
stored somewhere or are they just sent to the standard output... which I didn't 

These options really require some knowledge of what is supposed to work, which 
I don't have and haven't found yet. The dial_tone and multi_tone examples are 
pretty simple gnuradio-only ones, right?  These examples shouldn't have a lot 
of dependencies on stuff made and configured during the UCLA code tree 
installation process, I'm hoping.  Any guidance from anyone about what to try 
next would be very much appreciated.

/ David

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