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</o:shapelayout></xml><![endif]--></head><body lang=DE-AT link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a couple of questions regarding using SCIP (nonlinear) under YALMIP (interfaced for Matlab through the OPTI Toolbox).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>(1) I get the message "Original variable <nlobj> not released when freeing SCIP. Consider releasing variable first.": I could not find out how this works under YALMIP.<o:p></o:p></p><p class=MsoNormal>As far as I understood, this is not necessary but quite useful to use the Memory-Management. Is there a way to handle this using YALMIP?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>(2) Furthermore I am a litte irritated by the following message:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>SCIP Status : problem is solved [optimal solution found]<o:p></o:p></p><p class=MsoNormal>Solving Time (sec) : 0.22<o:p></o:p></p><p class=MsoNormal>Solving Nodes : 1<o:p></o:p></p><p class=MsoNormal>Primal Bound : +4.79653886000805e+03 (1 solutions)<o:p></o:p></p><p class=MsoNormal>Dual Bound : +4.79653886000805e+03<o:p></o:p></p><p class=MsoNormal>Gap : 0.00<o:p></o:p></p><p class=MsoNormal> [linear] <lincon45>: <xvar33>[C] -<xvar37>[C] <= 1e-05;<o:p></o:p></p><p class=MsoNormal>violation: right hand side is violated by 1.50505108851939e-05<o:p></o:p></p><p class=MsoNormal>best solution is not feasible in original problem<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does it mean that the solution is not feasable (yalmip reports the problem 0, which means feasable solution found)?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>(3) I calculate the same type of NLP (accurate: a heat exchanger network) a couple of times with different parameters (Temperatures at the in- an outlet). In most cases yalmip reports the problem "0" but in some cases it returns 9 (which is defined as "Unknown problem in solver" in YALMIP).<o:p></o:p></p><p class=MsoNormal>Do you have any idea what could be the problem here?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you in advance!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best, <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Valerie <o:p></o:p></p></div></body></html>