UsePaVeBasis is an option of TID. When set
to True, tensor reduction is always performed in terms of the
Passarino-Veltman coefficient functions (e.g. B_1, B_{11},
C_{001} etc.) even if those can be
reduced to the scalar functions A_0,
B_0, C_0, D_0. By
default this is done automatically only for tensor integrals with
vanishing Gram determinants.
This option may be useful, if you are doing computations where the kinematics may later lead to vanishing Gram determinants or if you plan to evaluate all the Passarino-Veltman coefficient functions numerically (e.g. with LoopTools or Collier)