Dear Roozbeh,
First of all I have to thank you for the great work made with Adonis.
I am experiencing some convergence problems in analysing tieback retained walls. After a run in which convergence has been reached, a new program run of the already converged model shows a residual force of the same order of magnitude of the initial one and converges to a new solution with greater displacements and lower tieback forces.
Have you experienced a similar problem?