<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Dear Forum,<br><br>I was trying to simulate this simple model of Type 12 house in order to see the annual heating demand. When I am trying to simulate it nothing is happening, I have nothing plotted on my screen, I have no errors indication, no .out file and at the same time when I press calculate the pop up window says calculation complete. Does anyone have any idean what could be the problem? I have uploaded the file so you could run it and see if you have the same problems. It would be really helpfull if you could provide an answer.<br><br>Best Regards<br><br>Tasos<br></td></tr></table><br>