Hi, I don't understand why I obtain infinity bound for a lot (not all!) entities using this code: WW.Cad.Drawing.BoundsCalculator bc; foreach (WW.Cad.Model.Entities.DxfEntity e in mModel.Entities){  bc = new WW.Cad.Drawing.BoundsCalculator();  bc.GetBounds(mModel, e);  if(double.IsNaN(bc.Bounds.Center.X))    return; //stop in tis point } What is the possible causes for this problem? Perhaps not all entities is correctly loadeds at this time? Thank's marc.

They might not be visible, check property DxfEntity.Visible. - Wout

Hi, yes it is! Thank's. marc.

Also you could check bounds.Initialized to see if it is initialized at all. - Wout

No sorry, your first solution have solved my problem. marc.