Hi,
When you use ‘Model Reference’ blocks, Simulink requires that tunable parameters (parameters you want to change during simulation or code generation) be defined in a way that is compatible across model boundaries.
Instead of directly using variables (like workspace variables) in the Tunable Parameters table of a referenced model you can use ‘Simulink.Parameter’ objects with appropriate Storage Class settings.
Create a ‘Simulink.Parameter’ object to set the value of one or more block parameters in a model, such as the Gain parameter of a Gain block. You create the object in a workspace or in a data dictionary. Set the parameter value in the object, then reference the object from the block.
You can read more about this from the documentation page:
You can turn off the warning also by following the documentation given here:
