In this study we simulate the electron dynamics for conjugated molecules of increasing size with 40, 54, and 68 electrons, which exhibit charge-transfer nature in the S 1 state, using both TDCIS and RT-TDHF methods. Both methods have the same ground state, with TD-CIS having correct physical behavior during field driven processes, whereas the RT-TDHF method has a densitydependent potential, as in RT-TDDFT, and exhibits similar errors as RT-TDDFT within the adiabatic approximation as the electron density is driven from the ground state. We here demonstrate for the first time that if the electron density is driven beyond the ground state using real time electron density propagation, significant sizedependent errors are observed.