Hello Bashir,
The solver failed because the contacts were not closed when it started.
The contacts were not closed because you didn't turn on Shell Thickness Effect.
The contacts were not closed because you didn't expand the geometry until the point where the faces are touching.
I explained previously that you can only start solving when the faces that have to push on each other are touching.
If you want to learn how to use contacts in ANSYS, you should start with a simple example and work your way up to more complicated cases. This model is complicated and I recommend you return to it after you have demonstrated success on simple examples.
Regards,
Peter
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