Hi Eleni!Don't yo get some "*.intrs.N.vtp" file together with the *.spheres.N.vtu's and others?
Do you want to export for visualization or for acquiring data? It is a bit unusual to look for "particles involved in each contact" in some vtk.
Cheers Bruno _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp

