# In the model, lines and nodes that lie in one plane are not integrated into the surface properties. Also when selecting the surface using 'Select → Related Objects', the boundary lines are only selected, not the lines within the surface.In the case of the 'Special Selection' command with 'Definition of Plane via 3 Nodes', the lines are displayed as integrated into the surface, but not after creating the FE mesh. I have set the tolerances for regenerating the model as necessary.

Objects like lines and nodes are automatically integrated in a surface by default, as soon as these objects have a static function (for example, supports, load reference). Objects that are not statically relevant are not automatically integrated in the surface.

The reason is as follows: the results are not averaged at integrated lines, thus often leading to a jump in the color distribution of the results values. At statically relevant lines, this is also correct. Many integrated lines, however, are so-called construction lines, and are particularly imported when importing a DFX file.

If you select the "Integrate unutilized objects in the surface" check box in the FE Mesh Settings dialog box (see Figure), all lines will be integrated in the surface.

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