2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/116947We make remarks on Fernández Guasti's paper [{\it J. Phys. A: Math. Gen.} 39 (2006) 11825-11832] by pointing out some mistakes Fernández Guasti derived therein.Comments for <J. Phys. A>; 2 Pages in totalGeneral PhysicsComments on "Attainable conditions and exact invariant for the time-dependent harmonic oscillator"text