I have some simulink model file downloaded from
and I want to convert it to MATLAB 2015b simulink model file as I am using MATLAB 2015b. So, far I know it not possible to work with some simulink model which are designed in some later version (because of present of some complex block). The models are designed with MATLAB 2018b and I am using 2015b. I am uploading the 2018b designed model file, please convert it to 2015b simuink model and upload the same.