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[Bruno Chareyre <question258763@xxxxxxxxxxxxxxxxxxxxx>]

Question #258763 on Yade changed:
https://answers.launchpad.net/yade/+question/258763

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
You are facing a numercial instability. Updating the timestep every 100 iterations with a safety factor =0.8 is not enough at some point, then it diverges.
Decrease the 100 or the 0.8, it will become stable.

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