There is no third point. There are 2 points which are connected with the line. I defined it as a beam. I put one contact between 2 points and the inner face of the shell. There was no an error in my analysis.
As you see in this picture, I changed the location of the points. Although they do not have a connection with the inner face, Ansys is solving this analysis again.
According to the rules of static analysis in Ansys, all parts must have a connection. In this picture, there is no connection between the points and the inner face of the shell but it is solving the problem.
How can I declare this bug to Ansys authorities?