Using postproc.py with the --watch option

Hello,

As I understand it, using postproc.py with the --watch option should update the view when the results file changes. I ran the command

./postproc.py -w rectangle_fine_quad.vtk

and then changed rectangle_fine_quad.vtk, but the view did not update itself. What do I need to do to get it to work? (I'm using SfePy 2012.4-git-59ad3cfd5a2f66f9ce56aa15656906920c4ccdfe and Mayavi 4.2.0.)

(This option seems useful since you could watch how the visualization changes as you change your PDE. Perhaps it should be enabled by default.)

Regards, Ben