Why am I having a problem when I use triangular face elements in the mesh for which I want to use the 'AFSURF' macro. The logic works fine when I have a quad mesh (see duct-heat.inp) but when I provide a regular shaped triangular mesh on the surface of the duct, I have a problem. The message refers to changing elements attached to an area, which makes no sense. Why is this happening?
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The AFSURF macro had to try and change the existing MESH200 3 noded triangles to create the SURF152 which a fourth (duplicate of third) node. But the element modify fails. The macro will work after you clear the MESH200 elements. |
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