<div dir="ltr"><div dir="ltr"><div dir="auto">Dear all,<div dir="auto"><br></div><div dir="auto">I'm trying to solve a nonlinear convex minimization problem with linear constraints which I have <br><div dir="auto">solved successfully using MATLAB fmincon.</div><div dir="auto"><br></div><div dir="auto">In fmincon, I used the option configuration as below</div><div dir="auto"><b>options=optimset('Algorithm','sqp','ScaleProblem','obj-and-constr','DerivativeCheck','off','GradObj','on','TolX',1e-16,'TolFun',1e-16,'MaxFunEvals',8000,'MaxIter',6000); </b><br></div><div>and I got local minima after 465 iterations.</div><div><br></div><div>In Ipopt, I have modelled my objective function, constraints and its gradients without errors, but couldn't solve the problem. I used various linear solvers and scaling. The magnitude of variables in the problem ranges from 10^-3 to 10^3 and I need to get the value of local minima below 10^-9. <br></div><div><br></div><div>The problem doesn't converge to local minima even after 200000 iterations. <br></div><div>Even after I used the solution which I got from matlab as initial values, Ipopt still iterates and doesn't converge. <br></div><div><br></div><div>Since I am not from a mathematical background I don't have much knowledge about Ipopt options.</div><div><br></div><div>Could anyone help me please.</div><div>Thank you</div><div>Hisham Abdulla<br></div><div><br></div><div><br></div><div dir="auto"><br></div><div dir="auto"><br></div></div></div>
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