Simulink Code Generation, independency from step-size and mat-logging

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Hi everybody,

for a project I have to generate C Code from a Simulink-model, for me, what important is, the relationship between input and output, not the input and output. I mean they could be a constant or a sin wave, its not important, because I am going to use in another environment input=x , and output=2*x ... its so very simple. I am trying to generate a subsystem regarding to have this, which has just input/output and a Gain Block for multiplication.

The problem is ; I don't want neither Mat-Logging (actually any logging data)nor step-size ! I can disabled the mat-logging in config. but I cant configure the step size, if I set it as auto, it gets automatically 0.2s :/ How can I figure it out ? shortly I don't need to set a step-size , because this generated code should be called in main C-Script and should not be depended to value like 0.2s or 0.4s .Thanks in Advance...

Best Regards Onur