  In a recent paper, El-Maaref et al. [J. Quant. Spectrosc. Radiat. Transfer
2019, 224:147] have reported atomic data for Zn-like W~XLV. Their results are
mainly for energy levels, radiative rates, collision strengths ($\Omega$) for
electron impact excitation, and cross sections for ionization, but for only for
a few levels/transitions, and in a very limited range of energy. For the
calculations of $\Omega$ they have adopted the DARC code. In this comment,
through our independent calculations, we demonstrate that their results for
$\Omega$ are highly underestimated by over two orders of magnitude, and hence
are totally unreliable.
