You need few files. which you can download from
Refprop files -
Link : https://trc.nist.gov/refprop/LINKING/....
Refprop Google drive Link (Download along with folders) : https://drive.google.com/drive/folder...
MATLAB function page-
Link :https://in.mathworks.com/help/physmod...
Before, we move proceed.
You need to make sure that your Refprop files are saved under location of " C:\Program Files "
Alright!