Hamza, modifying the proforma is one part of the process of modifying a component but you also need to modify the source code (the *.for or *.f90 file in the ..\TrnsysXX\SourceCode\Types\ directory) and then recompile the TRNDll. You need a Fortran compiler in order to carry out the second and third steps. best, David On 5/6/2011 13:00, hamza aouissi wrote: hi everybody, -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |