“…In Section 5 we shall give an explicit (Gaussian) counterexample with state space being a Hilbert space, in which even the underlying martingale problem is well-posed. For references on invariant and infinitesimally invariant measures see, e.g., [ABR99], [AFe04], [AFe08], [AKR97a], [AKR97b], [AKR98], [AKR02], [ARW01], [ARü02], [MR10], [MZ10], [ARZ93b], [BoRöZh00], [DPZ92], [E99], [BKRS14]. To the above "inverse problem" there exists a direct problem: given a (Markov) stochastic process M , find (if possible) a probability measure µ s.t.…”