请问一下，下面这些警告信息怎么处理？？

Whenever a translation (rotation) dof at a node is constrained by a kinematic coupling definition the translation (rotation) dofs for that node cannot be included in any other constraint including mpcs, rigid bodies, etc.

For *tie pair (assembly__pickedsurf69-assembly__pickedsurf68), adjusted nodes with very small adjustments were not printed. Specify *preprint,model=yes for complete printout.

For *tie pair (assembly__pickedsurf71-assembly__pickedsurf70), adjusted nodes with very small adjustments were not printed. Specify *preprint,model=yes for complete printout.

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

Boundary conditions are specified on inactive dof of 22 nodes. The nodes have been identified in node set WarnNodeBCInactiveDof.

Solver problem. Zero pivot when processing D.O.F. 1 of 1 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_1_1_97_1_1.

Temperature at 1 nodes has fallen below absolute zero. Increment will be attempted again with a new time increment. The nodes have been identified in node set WarnNodeTempBelowZeroStep1Inc894.

Solver problem. Zero pivot when processing D.O.F. 1 of 1 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_1_1_894_1_2.