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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Hi everyone,</p>
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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">I am trying to calculate the following equation:</p>
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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Eff_energy = (P_net+Q_heating+Q_DHW+Q_cooling)/(Max(0.000001,m_H2)*LHV)<br>
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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">I made a link between P_load (which is being calculated in different equation) and P_net, but I am still getting this problem:</p>
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<p style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">[</p>
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<b>TRNSYS Message 20 : The referenced variable used in this equation has not been defined in the TRNSYS input file. The equation begins with the string in "reported information"</b></div>
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<b>Reported information : EFF_ENERGY = (P_LOAD</b></div>
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]</div>
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In fact I supposed another equation : kkkk = P_load and it gave me the output correctly without any problems, so I am wondering what is the problem!!!</div>
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Please HELP!!! Any hint would be appreciated...</div>
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