Error: Initial conditions solve failed to converge. in a simscape simulation

Hey there!

I have a problem with a Simscape model:

I made a component, which combines 2 mechanical rotational inputs into one mechanical rotational output.

Code:

 component my_Leistungsaddierer
 % my_Leistungsaddierer

nodes
  P1 = foundation.mechanical.rotational.rotational;  % P1: left
  P2 = foundation.mechanical.rotational.rotational;  % P2: left
  P3 = foundation.mechanical.rotational.rotational; % P3: right
end

parameters
  ratio1 = { 1, '1' }; 
  ratio2 = { 1, '1' }; 
  eta = {0.97, '1'}; 
end  

variables 

    T1 = { 0, 'N*m' };  
    T2 = { 0, 'N*m' };  
    T3 = { 0, 'N*m' };  
    w1 = { 0, 'rad/s'};
    w2 = { 0, 'rad/s'}; 
    w3 = { 0, 'rad/s'}; 

end

function setup

    through( T1, P1.t, [] ); 
    through( T2, P2.t, [] ); 
    through( T3, P3.t, [] ); 

    across (w1, P1.w, []); 
    across (w2, P2.w, []); 
    across (w3, P3.w, []); 

    % Parameter range checking
    if ratio1 == 0
      pm_error('simscape:NotZero','Leistungsaddiere ratio1')
    end

    if ratio2 == 0
      pm_error('simscape:NotZero','Leistungsaddiere ratio2')
    end

    if eta == 0
        pm_error('simscape:NotZero','Leistungsaddierer eta')
    end

end

equations

     -T3 == (ratio1 * eta * T1)+(ratio2 * eta * T2);

      if T1 > T2
      w3 == w1*(1/ratio1);
      w2 == w3*ratio2;

      elseif T2 > T1
      w3 == w2*(1/ratio2);
      w1 == w3*ratio1;

      else
      w3 == w2*(1/ratio2);
      w1 == w3*ratio1;

      end

end 

end

When i connect the inputs with constant Torque Sources it works, but if i connect it with my system, the error:

"Initial conditions solve failed to converge."

appears.

Does somebody have a clue why this error is happening? The System without my component is working well.

Greetings