https://communities.sas.com/t5/Mathematical-Optimization/Linear-optimisation-problem-limitation-problem/m-p/488181#M2363 <P>Hey,</P><P>&nbsp;</P><P>I'm trying to optimise diets with the proc optmodel. So, my problem is composed of a quadratic objective function and many linear contrains. With the QP solver, I reached the limit of iterations even if I increased their numbers.</P><P>So, I have tried to use a IPNLP solver and now for some diets, I obtained the optimum and for others the best feasible solution. What is the difference? And how can I obtain the optimum?</P><P>&nbsp;</P><P>Thank you</P><P>&nbsp;</P> Mon, 20 Aug 2018 12:57:46 GMT LouiseS 2018-08-20T12:57:46Z https://communities.sas.com/t5/Mathematical-Optimization/Linear-optimisation-problem-limitation-problem/m-p/488181#M2363 <P>Hey,</P><P>&nbsp;</P><P>I'm trying to optimise diets with the proc optmodel. So, my problem is composed of a quadratic objective function and many linear contrains. With the QP solver, I reached the limit of iterations even if I increased their numbers.</P><P>So, I have tried to use a IPNLP solver and now for some diets, I obtained the optimum and for others the best feasible solution. What is the difference? And how can I obtain the optimum?</P><P>&nbsp;</P><P>Thank you</P><P>&nbsp;</P> Mon, 20 Aug 2018 12:57:46 GMT https://communities.sas.com/t5/Mathematical-Optimization/Linear-optimisation-problem-limitation-problem/m-p/488181#M2363 LouiseS 2018-08-20T12:57:46Z https://communities.sas.com/t5/Mathematical-Optimization/Linear-optimisation-problem-limitation-problem/m-p/488241#M2365 <P>Can you please share your data and code?</P> Mon, 20 Aug 2018 15:33:18 GMT https://communities.sas.com/t5/Mathematical-Optimization/Linear-optimisation-problem-limitation-problem/m-p/488241#M2365 RobPratt 2018-08-20T15:33:18Z