Dear TRNSYS users, do you use the type70? Is it normal that when you use it in iisibat, you don't need to indicate an external file name? When I want to run TRNSYS, the file isn't found! Thanks for your help. Best regards. Laurent SERRES IUT Génie Civil 3, Rue du Clos Courtel BP 90422 35704 RENNES CEDEX 7 FRANCE Tel: (33) 2 23 23 42 02 Fax: (33) 2 23 23 40 51 e-mail: laurent.serres@univ-rennes1.fr