Tunable array dimension parameter for code generation

Hello

I would like to set the dimension of some of my Input / Output ports as a defined parameter in a way that the generated code shall use the definition.

So I created a Simulink Parameter 'ARRAY_DIM' with value of 11, and Storage Class 'Define', and I gave the Input port Dimension field this parameter.

I expect the generated code to use it with the definition, so something like 'Input12[ARRAY_DIM]', so that I may manually change ARRAY_DIM however I like for C-Code variant builds.

However, the generated code uses literal constants, so 'Input12[11]'.

Is there any way to force the usage of the parameter? Does it have to be a variable size signal?