  We analyze the eigenvalues and eigenfunctions stemming from a recent study of
the interaction of a scalar particle with a Coulomb potential in the presence
of a background of the violation of the Lorentz symmetry established by a
tensor field. We show, beyond any doubt, that the physical conclusions drawn by
the authors from a truncation of a power series, coming from the application of
the Frobenius method, are meaningless and nonsensical.
