adams仿真进行到一半时不能进行了，错误提示如下

ERROR: At time 2.865588418E+00 the integrator is unable to proceed. Possible Causes:(1) The accuracy required for the numerical solution can not be attained.Relax (increase) the value of the acceptable integration ERROR.(2) Incompatible redundant constraints, a lock up, or a bifurcationsituation. The latter two indicate a mechanism design problem.(3) The system includes a zero (or relatively small) mass on a part withan unconstrained translational degree of freedom.Make sure you have mass on all parts with translational degrees of freedom.(4) The system includes a zero (or relatively small) inertia on a partwith an unconstrained rotational degree of freedom.Make sure you have inertias on all parts with rotational degrees of freedom.(5) An Adams element has a function expression that equals exactly itself.For example, SFORCE/id1,I=id2,J=id3,ROT,FUNC=SFORCE(id1,jflag,comp,rm),and DIFF/id4,IMPLICIT,IC=0,FUNC=DIF1(id4).Similarly, VARIABLE/id5, FUNC=VARVAL(id5)*TIME equals itself at 1 second. Avoid setting an Adams element equal to itself.ERROR: Simulation failure detected.ERROR: Simulation failure detected.