Why does my single frame restart from the final converged load step
of a nonlinear contact problem just immediately diverge.
Your model contains surface to surface contact elements, which can't be
used in a single frame restart. This is documented in ANSYS 9.0 in a note to
Section 22.214.171.124. Singleframe Restart Requirements of the Basic Analysis Procedures Guide.
[Ref Defect 25214]