Hello, What is the maximum number of zones that can be inserted in TRNBuild? Thank you in advance -- Anastaselos Dimitris Dipl. Mechanical Engineer Laboratory of Heat Transfer and Environmental Engineering Aristotle University Thessaloniki Box 483 54124 Thessaloniki, GREECE Tel: + 30 2310 996048 Fax: + 30 2310 996012 e-mail: jimanas@aix.meng.auth.gr URL: http://aix.meng.auth.gr