saveLearnerForCoder and loadLearnerForCoder does not work in R2018a

I wanted to export trained classification learner model into Simulink. This was possible by using matlab function block in simulink and using saveLearnerForCoder ,loadLearnerForCoder, predict inside the matlab function. But, saveLearnerForCoder and loadLearnerForCoder does not work in my version of Matlab(R2018a) . Is there any solution to my problem.

Thank you

[harris harris]

Is there anyone who could solve that?