  To achieve appropriate interaction rates in recent neutrino oscillation
studies, high atomic number nuclear targets were utilized. Because of the
nuclear effects in the experimental observable, the utilization of these
complicated targets produced systematic uncertainties that needed to be
assessed accurately to constrain the discovery. We made an effort to calculate
the nuclear effects in the Ar and H targets, which are intended to be employed
at the DUNE distant and near detectors, respectively, through our simulation
effort. The DUNE flux is peaking around 2.5 GeV and CCRES is the dominant
process at this energy. So, this work will be focused only on the CCQE and
CCRES interactions and the simulations will be done using two different
neutrino event generators. We reported the ratio of the oscillation probability
(P(Ar)/P(H) as a function of reconstructed neutrino energy for CCRES channels
to quantify the systematic errors in the observables.
