  Systematic error in determination of the absolute intensities of the two-step
gamma-cascades after the thermal neutron capture and its influence on the value
and localization of extracted from (n,2gamma)-reaction probable level densities
and radiative strength functions of dipole gamma-transitions have been
analysed. It was found that this error in limits of its possible magnitude
cannot change made earlier conclusions about the radiative strength functions
of E1- and M1- transitions at Egamma ~ 3 MeV and level density of heavy nucleus
below ~0.5Bn.
