When does ssGetInputPortSignal return NULL in mdlOutputs

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Rob 2014-6-25

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https://ww2.mathworks.cn/matlabcentral/answers/137559-when-does-ssgetinputportsignal-return-null-in-mdloutputs

Hi, from the Docs I got that if the InputPort is set to SS_REUSABLE_AND_LOCAL by ssSetInputPortOptimOpts I cannot use ssGetInputPortSignal inside of the mdlUpdate function, because the signal has already been used and is not valid anymore or whatever.

But I neither did set that flag nor do I try to call ssGetInputPortSignal from mdlUpdate. I built the CMex function using the FunctionBuilder Block and sourced the mdlStart and mdlInitializeSizes functions out because I implemented the strategy pattern to be able to change the input data type dependent on a value passed in as a parameter. Is that a problem? I don't know where to search, since I did not change the code that I sourced out.

Thanks and greets!