Likelihood of parameter vectors when B-K conditions not met

Hello all,

When computing the likelihood function, how does Dynare handle parameter draws for which B-K conditions are not satisfied?

From what I know the B-K conditions are necessary and sufficient to cast the model into a VAR, which is necessary to evaluate the likelihood with a kalman filter. When using gensys to solve the model outside Dynare, however, gensys is still able to give me a VAR solution for the parameters even the model is indeterminate.

All parameter draws that do not yield a unique stable solution are discarded by setting their likelihood to 0. See also