['finalmodel1change/Subsystem/Solver Configuration']: Error evaluating equations at time 0.0. Stopping simulation. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances) An implicit 6-DOF joint is attached to a degenerate mass distribution. This error occur after add plane sphere contact before that it show no erroes.

singularity error in solution

2021 8 12

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['finalmodel1change/Subsystem/Solver Configuration']: Error evaluating equations at time 0.0. Stopping simulation. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)
An implicit 6-DOF joint is attached to a degenerate mass distribution.

This error occur after add plane sphere contact before that it show no erroes.