  We investigate the dissolution process of star clusters embedded in an
external tidal field and harboring a subsystem of stellar-mass black hole. For
this purpose we analyzed the MOCCA models of real star clusters contained in
the Mocca Survey Database I. We showed that the presence of a stellar-mass
black hole subsystem in tidally filling star cluster can lead to abrupt cluster
dissolution connected with the loss of cluster dynamical equilibrium. Such
cluster dissolution can be regarded as a third type of cluster dissolution
mechanism. We additionally argue that such a mechanism should also work for
tidally under-filling clusters with a top-heavy initial mass function.
