Siamak, It sounds to me as though there is a problem with the building description file (*.bui) that is referenced by the Type56 model in your simulation. "Gentrn" is a little internal program that reads your *.bui file and processes it for the Studio. I would recommend looking at what *.bui file is referenced in the "External Files" tab of Type56, then making sure that the file exists and that TRNBuild can open it and process it without errors. If all that works then the Studio should be able to process it when you hit F8 to run a simulation. Kind regards, David siamak khorrami wrote: Dear Friends -- *********************************************************************** 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 *********************************************************************** |