Claire, yes, you do have to declare them since there is an "IMPLICIT NONE" line in the code. The order of the declarations is not important but all of the declarations must occur before any of the executable code can occur. Kind regards, david claire kazgandjian wrote: Hello users, -- *********************************************************************** Thermal Energy System Specialists (TESS), LLC David BRADLEY 22 N. Carroll Street - Suite 370 Partner Madison, WI 53703 USA P: +1.608.274.2577 F: +1.608.278.1475 E-mail: bradley@tess-inc.com Web Pages: http://www.tess-inc.com and http://www.trnsys.com *********************************************************************** |