How can I lock a block in Simulink?

I wrote my own library, with one S-Function Block in Simulink. I want that it is possible to insert the block once in a Simulink Model, but not a second time (in the same model). I want that the my block is unique in the model. I need the block for some settings. Is there a chance to do that?

Answer 1

[Andreas Goser]

I suppose there is no way to present inserting the block a second time, but you can verify if more than one block of this type exists right before running the model. You would need to apply MATLAB code with e.g. the "find_system" command as a model callback .

[Andreas Goser]

You find model callback in File -> Model Properties. You can use e.g. "StartFcn"

[Andrea]

With "find_system" I can see if there are more than one blocks. Is it possible to delete, or remove the second one?

[Andreas Goser]

Yes. There are more Simulink API commands. Here DELETE_BLOCK