<div dir="ltr"><div class="gmail_default" style="font-family:monospace,monospace"><span id="result_box" class="" lang="en"><span>Dear all,<br><br></span></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span id="result_box" class="" lang="en"><span>Please, can any one help me to fix this problem:<br></span></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span id="result_box" class="" lang="en"><span><br>For</span> <span class="">some reason</span><span class="">, I try to</span> <span>do</span> <span class="">the following operation</span> <span>on the outside surface (S1) of an external wall</span> (with type 56 and an equation)<span>:</span><br><br><span>surf. gain outside_S1 = <i>Quser</i>+QSKY_S1-ABS*IT_S1-HCONVO_S1*AREA_S1*(TAMB-TSO_S1)<br></span></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span id="result_box" class="" lang="en"><span>i.e. </span></span><span tabindex="-1" id="result_box" class="" lang="en"><span class="">eliminate</span> <span class="">on this surface</span> <span class="">all</span> <span class="">gains</span> <span>calculated</span> <span>automatically</span> <span>by</span> <span>Type 56 and add instead a user defined gain Quser.<br><br></span></span><br><span tabindex="-1" id="result_box" class="" lang="en"><span>This</span> <span>seems to</span> <span class="">work perfectly</span> <span>at the beginning of the simulation </span><span>before</span> <span>arising this</span> error<span>:<br><br>Message: outside temperature of 1 (external) wall in zone 1 at time  2419.00 not converged!<br><br></span></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span tabindex="-1" id="result_box" class="" lang="en"><span>I tried to modify Convergence tolerance, to change the components torder, etc ... </span></span><span class="">fruitlessly<br><br></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span class="">Best regards,<br></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span class="">Rabah<br></span></div><div class="gmail_default" style="font-family:monospace,monospace"><span id="result_box" class="" lang="en"><span class=""></span></span></div></div>