I have got a problem with computing 2D flow areas hydraulic table in the RAS Mapper. I expecta that it won't compute during unsteady flow simulations if it doesn't work in RAS Mapper. The proramme show the follow error:
Unable to compute 2D Flow Area's subgrid face tables: The terrain associated with this geometry does not completely cover the 2D Flow Area. See face #:24096
And I don't have any idea what is wrong with geometry and how to find face 24096. Additionaly terrain area is bigger than 2D flow area.
It is not unusual to see small gaps in terrain data, particularly if it is based on LiDAR. A RAS 2D model can still run if there are gaps. However, the error above will be generated if any of the cell faces is located entirely within the gap. This can be addressed by editing the cell such that a portion of each face intersects the terrain data.