The error dialogue is like Element 350079 (type = 2, SOLID185) (and maybe other elements) has become highly distorted.  Excessive distortion of elements is usually a symptom indicating the need for corrective action elsewhere.  Try ramping the load up instead of step applying the load (KBC,1).  You may need to improve your mesh to obtain elements with better aspect ratios.  Also consider the behavior of materials, contact pairs,       

 and/or constraint equations.  If this message appears in the first iteration

of the first substep, be sure to run shape checking of elements".

I have opted hexahedral mesh with element size 0.1mm on the loaded region and applied load is about 500 MPa . The frictionless contact is chosen (see attached file). The time steps are like 

Initial substeps= 10000

Minimum substeps= 700 and

Maximum substeps= 50000

I have also attached the pdf of out file. 

Any suggestions will be highly appreciated.

Best regards,

Mosarraf