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[Jan Stránský <question680689@xxxxxxxxxxxxxxxxxxxxx>]

Question #680689 on Yade changed:
https://answers.launchpad.net/yade/+question/680689

Jan Stránský posted a new comment:
> always unbalanced force: nan mean stress: nan)

Good findings, now the right question is, why the unbalanced force is
NaN. One situation is that there are no interactions. Also please try to
find if some other value is NaN, like b.state.pos of some body or
something like that.

There should not be much difference between PWaveTimeStep,
GlobalStiffnessTimeStepper and setting O.dt directly (to a reasonable
value)..

cheers
Jan

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