"DP 0" error while updating meshing
 

I am doing gravitational water vortex power plant simulation and I created my geometry in AutoCAD and imported to Ansys Fluent. I meshed the geometry but when I tried to update a message "((DP 0) the mesh component in fluid flow fluent requires user input before it can be updated." appears. I am stuck at this point now. what might be the problem and what is the solution for this ?