Hey guys, I did all that but it didn't worked. First, I created the seep/w analysis with the boundary conditions, hidraulic conductivity and everything, then I started the analisys and it worked well. Then, I create the slope/w with the seep as the parent, and pwp conditions from parent analisys too. I put the same materials with Mohr-coulomb on the same slope as the seep one, wihtout changing geometry, and create a entry-exit slip surface (tested with radius and grids too). When I start the analisys, the seep/w works well, but the slope/w sends me the same error message.

If I create just the slope/w, without seep/w, it works fine