  We tried to determine the range of validity of a recently proposed
modification of the Hellmann potential that leads to analytical eigenvalues and
eigenfunctions. We discuss the difficulties that we found in the analysis of
the main equations and results. We conclude that the eigenvalues reported by
the authors do not exhibit the same order as those of the Hellmann potential
thus leading to a different underlying physics. What is more: the spectrum of
the modified model is qualitatively different from the one supported by the
Hellmann potential.
