allow_unknown parameter ignored

edit

Hi there,

I want to avoid the global planner to plan its paths through the unknown because it is not working for my case. So as described here I set the paramter allow_unknown to false. So I created a yaml named global_planner.yaml file like this:

NavfnROS:
   allow_unknown: false
   default_tolerance: 5

In the launch file for the move_base node I added a line to load the parameters:

<node pkg="move_base" type="move_base" name="move_base" respawn="true">
   <rosparam file="$(find multi_robot_simulation)/config/global_planner.yaml" command="load" />
</node>

The parameter also shows up in the parameter server:

rosparam get /move_base/NavfnROS/allow_unknown

returns false, as expected. So, whats wrong here???

Thanks for any help! Micha

UPDATE:

I just pulled the navigation package from github to do some tests with the code. I realized the parameter is read just fine! The path planner still plans its path through unknown! Why??