Was the Remote Displacement Behavior set to Rigid or Deformable? Try setting it to Rigid.
In a nonlinear solution, there are convergence tolerances on Force, Moment, Displacement and Rotation. The default convergence tolerance is 0.5%, which is acceptable for most solutions. If you need tighter tolerances, just type in a smaller value for the displacement tolerance, such as 0.01% under the Nonlinear Controls category of the Analysis Settings. You might find that more iterations are required to solve the model when you use tighter tolerances.