In a simple FEA simulation I am running, this error keeps popping up. "The Iterative Solver stopped. Numerical difficulties. (Preconditioning failed) Please check model boundary conditions. No results saved.
It is a 3 part assembly, with a cylinder rod and two clips that fit around it.
First suggestion: use a symmetry. The software will work the half. But this not should be the problem.
Are the two pieces sliding over the bar? This could be the problem.
In other words, are three parts ( not fixed: problem) or just one part?
Upload the file will be another option to get a fast answer.