Extracting one component of a tensorField
 

In a tensor T if you use T.xx() it returns the first component of it, and according to openfoam convention when you do it to a tensorField it should return a scalarField, like when you do it with a vectorField, but when I try to use it that just blows up and complain that no such a member is defined. How should I extract this field?

Please give me a guide, I rather not go through the forAll to access each point individually.

Hello Dear Mahdi

using following structure: