Problem with derivative du/dt in Simulink

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ALEXIS le 2 Juil 2014

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Modifié(e) : ALEXIS le 2 Juil 2014

Hello, i have a problem with using the derivative of the speed of a machine in Simulink. The following message pops up: Unable to reduce the step size without violating a minimum step size of 2.2250738585072014E-308 at time 1.3034180890316852E-308. The simulation parameters of my model are on the attached image. Any ideas? Thx