Hi all! I'm trying to make a new building with certain complexity in ESP-r (the new version, in windows xp). unfortunately when I try to change certain geometry attributions (create a new wall from existing vertices) the software crash (look like a memory fault caused by ESP-r) I was trying so to make two simple rectangles and create new surfaces from existing vertices (by deleting and trying to recreate the same surfaces) with the same crash result, so is not a problem for the complexity but from the software I see, somebody could help me to avoid this problem? maybe one from the developers team of ESP-r could fixed it? is really more easy for some complexity surfaces create first the vertex and then just associated them to create a new surface. Regards, David Garcia -- David GARCIA SANCHEZ ------------------------------------------------------------ Département Systèmes Énergétiques Environnement Ecole des Mines de Nantes 4, Rue Alfred Kastler 44300 Nantes France ------------------------------------------------------------ Email: <a href="mailto:david.garcia-sanchez@emn.fr">david.garcia-sanchez@emn.fr</a> Tel: +33 (0) 2 51 85 82 14 Mobile: +33 (0) 6 78 15 08 09 Fax: +33 (0) 2 51 85 82 99 ------------------------------------------------------------