Export from NX results missing items in 3d pdf

when I export PMI object from NX11, results in 3D PDF some missing items. expecially datums. They dont seem In the model tree and display.

could you please help about this.?
thanks

Dear Partner,

Please contact us at the support for a deeper analysis of your case.

you can reach us at:

support@tetra4d.com

Sincerely yours,

Tetra4D Support Team