When I try to simulate a model with a bearingfriction block I get the message that the equations referring to this block:
Matrix singular!
under-determined linear system not solvable!

The code for the block is:

  Modelica.Mechanics.Rotational.Components.BearingFriction bearingfriction2(tau_pos = [0, Fl[1]; 1, Fl[1]]) annotation(Placement(visible = true, transformation(origin = {58, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));

Before and after is just an inertia and an ideal gear.
See the error message during the simulation and the debugger for this case.

Do you have any tips how to solve this?x