Revista Mexicana de Física EComment on ``The one-dimensional harmonic oscillator damped with Caldirola--Kanai Hamiltonian''G. F. Torres del CastilloPublished Jul 1, 2019• 2 citationsPublisherAbstractSeveral conceptual errors in a recently published paper ({\it Rev.\ Mex.\ F'{\i}s.\ E} {\bf 64} (2018) 47) dealing with the damped one-dimensional harmonic oscillator are pointed out.DOI10.31349/revmexfise.65.103