Hi Pavel, you are right.

I just testing all my MEX files. TMW changed the MEX API so massively, that significant number of third-party MEX files I use (~20% in my case)  does not work with R2018a. This is terrible situation for all third-party matlab toolbox users!!!

I am a bit disappointed, how quietly is TMW  able to change the MEX API, without any warning to all third-party toolbox developers.