Thanks for replying.nI followed your advice and checked the geometry in space claim, but no error was found. The physics preference has been set to CFD as follows:nI have added local control over the sizing of the body of influence, wing face, and wing leading edge. The mesh does not make use of any periodic boundary. There is no error pop up with reference to any geometry, only inflation creating stairstep error as follows:nI forgot to add the following in the original post:nThe leading edge of the wing mesh results as follows:nThe number of elements: 24805549 Nodes: 4338225 n