Reduce nodes and cells on mesh

Hello everybody. I ask you for a hand to reduce the number of nodes and cells on this mesh because when I go to simulate it stops immediately. I urgently need to fix this. if anyone know how to do it and can help me i would be very grateful. I am attaching the link to see my mesh:
https://www.simscale.com/workbench/?pid=7074487650232377579&mi=spec%3A3b959299-1855-4f99-b105-df55c78f630f%2Cservice%3AMESHING%2Cstrategy%3A336&sh=302

Hello matyfalcone,

In order to reduce the cell count, please reduce the overall fitness of your mesh.
On a different node, it might be that to achieve accurate results this amount of cells might be needed since you have a lot of small pipes which need this kind of accuracy to be simulated properly.

Also can you please share the info you get when the simulation stops?

Best regards
Sebastian

hi I tried as you recommended lowering the overall fitness of your mesh but the number of the cell and nodes is still high.when I try to start the simulation it runs for an hour and then it freezes saying “exceeded runtime”.