How can I regenerate a solid with instances via RegenInstructions?

Hi guys,

In the migration fro Pro/e to Creo, we have some problems with the code to regenerate models. At the moment ihave this code but it doesn't work. Anybody can help  me?

for (i = 0; i < solids.Count; i++)

  {

    try

     {

       var solid = solids.Item (i);

       WlWindowRepaint();

        if (solid.Genericname== void null)

            // if the model to regenerate is a generic or instance model

            {

            var I_regen = pfcRegenInstructions.SetForceRegen

            solid.regenerate(I_regen)

            }

        else

            {

           solid.pfcRegenInstructions.UpdateInstances

           //WlWindowRepaint();

            }

       solid.save();

       }

}

JC