Use of Radiative transfer module in code saturne

Hi all,

I'd like to run a calculation with CS taking into account radiative transfer. Do I need a mesh in a specific format to do so ?

In fact I already ran a calculation without the influence of radiative transfer, and I'd like to run one with radiative transfer, to compare both and analyze the effects of radiative transfer.

I tried running exactly the same calculation in both cases, with the same mesh, and one using the radiative transfer (with usray1.F and usray2.F). When running the simulation with radiative transfer, I get the following error message : " connectivite faces->sommets ou coordonnees noeuds->sommets ne sont pas fournies", and the calculation is not run.

Does someone here has an idea about what I should do ?

Alicia