Comment on 'Thermodynamic relations and ro-vibrational energy levels of the improved Poschl-Teller oscillator for diatomic molecules'

In this comment, it is shown that the vibrational energies of the X-1 Sigma(+) state of the RbH molecule via improved generalized Poschl-Teller potential reported by Eyube et al (2021 J. Phys. B: At. Mol. Opt. Phys. 54 155102) are calculated incorrectly. Accurate calculations are given in the present study.