[ndnSIM] Cannot launch visualizer in scenario-template project

[Julian Wulfheide]

Hi,
I installed ns-3 and ndnSim as described here:
http://ndnsim.net/getting-started.html#simulating-using-ndnsim

I then copied the simple example
(http://ndnsim.net/examples.html#simple-scenario) into the template
project (scenarios/) and tried running it with
./waf --run=ndn-simple --vis
The visualizer does not show up.

When I switch to the main ns-3 directory and create a ndn-simple.cc
and use the same command to start the simulation, the visualizer does
show up.

What can I do to launch the visualizer in the scenario template?

Thanks!