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[Question #261239]: Loading saved state and GlobalStiffnessTimeStepper

 

New question #261239 on Yade:
https://answers.launchpad.net/yade/+question/261239

Greetings all,
I'm having a strange problem with the loading of a saved simulation.
The simulation I'm running is a mill with periodic BC along the axis of rotation.
I'm saving (O.save(..)) every 20000 time steps. My problem is that when I try to reload, sometimes (not all the time) the GlobalStiffnessTimeStepper makes the timestep O.dt=NaN and then it crashes. 

If I keep the timestep to be O.dt=.5*PWaveTimeStep(), then all is fine.

I'm using the following arguments for the timestepper:
GlobalStiffnessTimeStepper(timeStepUpdateInterval=10,timestepSafetyCoefficient=0.5,defaultDt=.5*PWaveTimeStep(),viscEl=True)

Any ideas as to what's going on here?

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