Object does not show in Host (5 replies)

I was used to Ponterface and I liked the toolhead path simulation on the screen, while printing.

Now I have moved to Repetier Host, but probably I make some errors, because:

I do not see the objects I load.
I do not se the layers when printing.

It concerns objects that have been sliced outside of Repetier (by Slic3r) so I load Gcode only.

Any idea why I do not see my objects on the build plate in the left pane ? Also not when hitting the preview tab

Thomas