Draftsight Premium : Parametric constraint with block

Hi everyone, I'm currently using the trial version of Draftsight Premium. Before getting the full license, I want to know if it's possible to parametrically constrain two blocks to one another. I can constraint them but if a change to value (dimensionnal) of the constraint, the distance doesn't update and stays the same. Seems to be working with normal entity but it doesn't work when trying to do it with blocks.