Wang, The error message should reference one of the Types in your simulation. TRNSYS is telling you that it doesn't like the value of parameter 4 for that Type. You might get this error if you entered a negative value for the specific heat. You might also get this error in a 2-stage thermostat if you entered a second stage setpoint temperature that was greater than your first stage set point. David On 5/3/2011 09:56, 王洋 wrote: Dear all, -- *************************** 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 |