Inertia Tensor not appearing in mass properties

[bonbonbaron]

Hi all,

Usually when you open the Mass Properties of an object, the inertia tensor/matrix shows up near the bottom. Not so in my current case; I opened up the mass properties of an assembly, and all it's showing me this time is the total mass and center of gravity. Does anyone have any idea why the tensor is being left out? If so, how do I get it to reappear?

Many thanks!
Michael