postprocessor- particle tracking

Hello,
after the simulation of my problem, I use postprocessor for visualizing the particle tracking.
Although in simulation menu, when I choose view results -  particle tracking, everything are o.k. , when i choose view results -  particle tracking in the postprocessor menu, I have no results.
Could anyone help me with this???

Thank you

The procedure is exactly the same in simulator and postprocessor if you use the same settings. Please make sure that you start 'steady' pathlines and start them on the same slice you have used in the simulator.