CFX particle tracking

Mehmet SORGUN

I want to make a model particle tracking in the eccentric annulus with newtonian fluid.But I get warning from CFX Solver Manager '' ONLY 0.0% of the particles of the cuttings could be injected in region and only the corresponding fraction of the spacified massflow is injected''.I do not understand this message mean and what I have to .. I can not sent particle in the eccentric annulus although I charecterize cuttings and chose particle tracking in the domain ..Also, Pressure in the system does not change with particle mass flow rate..I did not know What I have to..