Dear TRNSYS users, I'm trying to obtain the same result with iisibat that I obtained with CONSTANTS card in TRNSYS. I don't find in the help. How can I do? Thanks a lot. regards. SERRES Laurent 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