  In this Paper we analyze a model proposed recently with the purpose of
studying the effects of rotation on the interaction of a point charge with a
uniform magnetic field in an elastic medium with a spiral dislocation. In
particular we focus on the approximation proposed by the authors that consists
of changing the left boundary condition in order to obtain analytical results.
We show that this approximation leads to quantitative and qualitative errors,
the most relevant one being a wrong prediction of the level spacing.
