[Discuss-gnuradio] Executing the flow graph: window closes immediatly

Hello,

I'm totally new to the gnu radio project and trying my first steps into the world of SDR.  

At this moment i ran into a problem:  I followed the steps of the tutorial at http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GRC

I made the flowchart exactly as described in the tutorial, but when i try to execute the flow graph, a window appears and directly closes.  

When I try to run the code directly from the terminal i get following message: Segmentation fault (core dumped)

I'm running Ubuntu 14.04 LTS.  

How can I fix this issue?

Regards

Nick