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</o:shapelayout></xml><![endif]--></head><body lang=DE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-family:"Arial",sans-serif'>Hallo everyone,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'>I’m having a problem with the simulation of my 45-zone-model – at timestep 8,75 (0,25 h steps) the error message(s) “MULTIZONE BUILDING - SHADING RATIO OF A WINDOW IS LARGER THAN 1 OR LESS THAN 0” appears. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'>For all my windows I have an external shading which is an input from dck. But I don’t have a separate equation per window. I simplified the orientations to N-E-S-W have these orientations for each zone </span><span lang=EN-GB style='font-family:Wingdings'>à</span><span lang=EN-GB style='font-family:"Arial",sans-serif'> means 4x45=180 shading equations. I checked the equations and the printed values – are correct – and also set it to constant 0 – still the error messages. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'>In an existing conversation from the archieve (“2nd error generating shading/insolation matrix -> too many shaders on projection plane”) the problem was solved by adding MIN and MAX function to the shading equations – with this addition also the iterations in-between, not just the last iteration, have to be between 0 and 1. But I tried it and it didn’t help.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'>In the same conversation a previous error was solved by reducing the surface numbers, because the surface numbers were higher than 999 </span><span lang=EN-GB style='font-family:Wingdings'>à</span><span lang=EN-GB style='font-family:"Arial",sans-serif'> could this be the problem? I have a quite big building with almost 1700 surfaces, especially a lot of single windows. I could simplify the windows and combine them per wall-surface to one big window, but I want to check your expertise first.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'>Kind regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-family:"Arial",sans-serif'>Manfred Schindler<o:p></o:p></span></p></div></body></html>