  Studies of implementation of the simulation of the Bose-Einstein correlation
effects in the JETSET particle generator are performed. Analysis of dependance
of the one-dimensional correlation function parameters on the presumed boson
source size reveals appearance of the effective new length scale, which limits
applicability of the simple momentum-shifting mechanism, employed by JETSET to
simulate the Bose-Einstein correlation. Two- and three-dimensional correlation
functions are analysed as well and compared to the DELPHI data.
