Why does a Stateflow freeze?

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Filmon Yacob
Filmon Yacob 2013-6-30
Why does a Stateflow freeze--turns to gray and generates no outputs despite input signal availability? I tried events, clock, signalbuilder,solver config to wake it up but no change. I am using the stateflow along other simulink models that work good.

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Siddharth
Siddharth 2013-7-1
Hi Filmon,
this seems like something that technical support at the MathWorks can help you with. Contact them at support@mathworks.com
-Sid
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Andreas Goser
Andreas Goser 2013-7-2
To be precise: The model / the program was actually not frozen but running with very small time steps. And the recommendation was to use the solver ode23tb, which is more suitable for stiff systems.

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Andreas Goser
Andreas Goser 2013-7-1
While Siddharth is correct, contacting support should be considered, a couple of questions come to mind:
  1. All models or just your model freezes? What about a demos like "sf_car"?
  2. Any potential system requirement issues (like Release 13 on Windows 8...)?
  3. In general, what is your MATLAB release, OS, architecture (32 or 64 bit) and C Compiler?

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