[Discuss-gnuradio] segmentation fault (core dump) -- help needed

[Thomas H Kim]

Hi all,

I'm a newbie in gnu software radio (and
in python, and in linux) and got stuck on this segmentation fault issue.

I am trying to setup GNU software radio
on a machine (HP workstation xw8600 with dual intel Xeon processor). 
I installed Fedora Core 14 and installed
all needed dependencies using YUM as shown below. 

yum groupinstall "Engineering and
Scientific" "Development Tools"
yum install fftw-devel cppunit-devel wxPython-devel libusb-devel guile
boost-devel alsa-lib-devel numpy gsl-devel python-devel pygsl python-cheetah
python-lxml
yum install sdcc 

yum install gnuradio
yum install gnuradio-examples
yum install usrp 

The installation went ok without any
issue. 
However, when I tried dial tone example
at "/usr/share/gnuradio/examples/audio/dial_tone.py", it said
nothing else but "segmentation fault(core dump)", and nothing
happened. I tried other examples, but this segmentation fault error came
up all the time. I found a couple of simple gnu radio examples from google
and tried, but the same thing happened. I inserted print statement in the
code to see where it failed and it failed in "my_top_block().run()"
function. 

I want to know why this problem occurs
and how to solve it. Can anyone help me out? Any idea/suggestion will be
welcomed. 
I'm still studying GNU software radio
blocks, but is there any way to narrow down which block (or which function)
cause this segmentation fault? 

Thanks!

Thomas