Yade

Loading saved state and GlobalStiffnessTimeStepper

Asked by Timothy Povall

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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Chareyre (bruno-chareyre-9) said : 		#1

It sounds like a bug. Could you please report a bug about that?
Does it returns NaN when the save/load occures at the exact iteration
when GSTS is supposed to compute something by any chance?
Bruno

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