  We present numerical results on diffractive dissociation with large invariant
mass diffractive final states in the scattering of an electron off a hadron.
The diffractive large-mass resummation is performed using the nonlinear
Kovchegov-Levin equation, taking into account running coupling corrections. For
the scattering off the proton, a (modified) McLerran-Venugopalan amplitude is
used as the initial condition for the nonlinear evolution, with free parameters
being constrained by the HERA inclusive data. The results show a reasonable
description of the HERA diffractive structure function data at moderately large
diffractive mass when the impact parameter profile is constrained by the
low-mass diffractive cross section data. The calculation is extended to nuclear
scattering, where the initial condition is generalized from the proton case
employing the optical Glauber model. The nonlinear large-mass resummation
predicts a strong nuclear modification in diffractive scattering off a nuclear
target in kinematics accessible at the future Electron-Ion collider.
