Atom Ternjs not able to find references


On any given file, I highlighted a function, and right click to select Atom Ternjs, then select “Find References”. There is no result. It appears Ternjsis is not doing any search for references outside this file.

I do know there is another file that calls the function.

How do I enable Ternjs to search all files in parent, sibling, child, and present folders?

Is there another package that is optimized for reference search?
Thank you.