Abaqus - error: There is no contact element to map the constraint point grouping record.

 Is there anyone has viewed the error ?  

  There is no contact element to map the constraint point grouping record.

  The fatal error occurred when the Abaqus model has run about 4 hours. The calculation was terminated due to the error, and no message file was outputted.

  Together with the error, one warning was observed.

----MPCS (EXTERNAL or INTERNAL, including those generated from rigid body definitions), KINEMATIC COUPLINGS, AND/OR EQUATIONS WILL ACTIVATE ADDITIONAL DEGREES OF FREEDOM.

  Anyone can help? Thanks.

Abaqus