pb with tutorial: Lid-driven cavity flow
 

Hi,
i learn OpenFoam 1.4 on CAElinux distribution. I wish to plot a streamlines of velocity in cavity. With the cavity.OpenFOAM module highlighted in the Pipeline Browser, I select Stream Tracer from the Filter menu and then click Apply. I continue the tutorial. I should then select Tube from the
Filter menu to produce high quality streamline images.... I can't select Tube, because i can not access the filters. What i do? :rolleyes:

thanks.