I have a combined 1D/2D reach where a 1D river flows into a 2D area and flows back into a 1D reach downstream of the 2D area. I can easily modify the manning n in my 1D reaches using hec-ras controller. however, in my 2D reaches, though the manning’s table in the geometric data editor window shows that default manning’s n has been replaced, the pre-processor doesn’t run to update the hydraulic parameters of the 2D area before running the model. How do i make hec-ras update the cell properties after each run?