Android Databinding : package does not exist

The bug is not the DataBinding Package, it's a syntactic or logical error. For example, you have the attribute "lastName" in your POJO, but in the layout it's android:text="@{user.lastname}".

Check your "layout" and do Rebuild Project.

earlier my package name was "com.xyz.abc.Models" changing the package name to all small letters "Models" -> "models"

solved the issue.

Thanks to Yigit!

The issue was not directly link to Android Databinding. There were a bug in the project (some variables not correctly setted)

I would recommend to use gradle with "--debug and --stacktrace" for more informations, it's helping a lot.