How to disable the Diagnostic...taking too much of time

Hello Friends, I am trying to solve a symscape model. And its taking too much of time. I am getting following error. Please help me.

Warning: The solver chosen is not recommended if the model is stiff, which is typical for models containing Simscape components. These solvers are typically preferred for Simscape models: ode23t, ode15s or ode14x (fixed-step). To disable this diagnostic, change the explicit solver diagnostic setting on the Simscape panel of the model Configuration Parameters.

[Walter Roberson]

Turning off the warning message is going to change your solution time by a small fraction of a second. Have you considered switching to a fixed-step solver like the message suggests?

[Guy Rouleau]

What is not clear?... "To disable this diagnostic, change the explicit solver diagnostic setting on the Simscape panel of the model Configuration Parameters."