Tunable Sample Time for Referenced Model

I have developed a generic model and I would like it to have undefined sample time until I reference it in a top model.

I have followed this answer:

https://es.mathworks.com/matlabcentral/answers/99771-how-can-i-use-a-different-sample-time-in-a-model-that-is-referencing-a-configuration-set-from-the-to

The problem is that I need to do do some operations inside the referened model refering to the sample time.

• I have defined Ts interface parameter in the model workspace in the generic model.
• I have also defined the sample time to auto in the configuration pane and the sample time in the in "inport" ports to Ts.

After doing this, I could define the sample time of each referenced model

However I get the next error:

Parameter 'SampleTime' of 'Hueco_Fallo/Value' is non-tunable but refers to model arguments (Ts)