creating new material in FDTD solution

I am working with material Si3N4 and wanted to add the Si3N4-luke data to the material explorer, for this I created a new material and saved it but every time I exit FDTD and open it again the new material disappears. Does it not save permanently.?

Hi, @rsharma !

Here is the information that will solve your issue:

How to add new material into the material library(Optical)