Create a standalone exe from Simulink model

I found that from 2020a we can export a simulink model to standalone .exe file.

Is there a limitation for this option? forexample all the block such as graphc gauges, user inputs, ... are available?

How can I create this .exe file. When I try to use slbuild on my model I get the following error:

Error using coder.internal.validateModelParam

'E:\rally\simulink_mavlink-master\examples\myTest.slx' is not registered with MATLAB as identifying

a Simulink model, hence it cannot be compiled. There may be a MATLAB class with the same name. If

so, rename either the model or the class

Am I doing this Correct?