good day everyone! i am working on a study using hec ras 2d. when i tried to run the unsteady flow analysis this is the message: Cannot recompute 2D property tables. No terrain is associated with this geometry. Go to the GIS Tools/RAS Mapper window and right click on this geometry in the left panel and select ‘Manage Geometry Associations…..’
I followed the instructions but the problem is not solved. Can somebody help me solve this problem? Thank you.