<div dir="ltr"><div class="gmail-votecell gmail-post-layout--left" style="margin:0px;padding-top:0px;padding-bottom:0px;padding-left:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-family:-apple-system,"system-ui","Segoe UI Adjusted","Segoe UI","Liberation Sans",sans-serif;font-kerning:inherit;font-feature-settings:inherit;font-size:13px;vertical-align:top;box-sizing:inherit;width:auto;color:rgb(35,38,41)"><div class="gmail-js-voting-container gmail-d-flex gmail-jc-center gmail-fd-column gmail-ai-stretch gmail-gs4 gmail-fc-black-200" style="padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;display:flex"><div class="gmail-js-vote-count gmail-flex--item gmail-d-flex gmail-fd-column gmail-ai-center gmail-fc-theme-body-font gmail-fw-bold gmail-fs-subheading gmail-py4" style="padding-right:0px;padding-left:0px;border:0px;font-style:inherit;font-variant:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;font-weight:600;display:flex"><span style="font-size:15px;font-weight:400"><span style="font-family:inherit;font-style:inherit;font-variant-ligatures:inherit;font-variant-caps:inherit">I tried to change the option, such as feas_tolerance, of couenne solver (global solver of MINLP). I used Pyomo and Colab. Does anyone know how to change it?</span><br></span><span style="font-size:15px;font-weight:400"><br></span><span style="font-size:15px;font-weight:400"><p style="margin:0px 0px 1.1em;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">I tried this step:</p><div style="color:rgb(0,0,0);background-color:rgb(247,247,247);font-family:monospace,Menlo,Monaco,"Courier New",monospace;font-size:14px;line-height:19px;white-space:pre"><div>solver = SolverFactory(solver)</div><div>solver.options['feas_tolerace'] = 1 # any value...</div><div>results = solver.solve(model, timelimit=10)</div></div><p style="margin:0px 0px 1.1em;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">However, I got this log: </p><p style="margin:0px 0px 1.1em;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">ERROR:pyomo.opt:Solver (asl) returned non-zero return code (1) ERROR:pyomo.opt:Solver log: Couenne 0.5.8 -- an Open-Source solver for Mixed Integer Nonlinear Optimization Mailing list: <a href="mailto:couenne@list.coin-or.org">couenne@list.coin-or.org</a> Instructions: <a href="http://www.coin-or.org/Couenne" rel="nofollow noreferrer" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit">http://www.coin-or.org/Couenne</a> couenne: Unknown keyword "feas_tolerance" Unknown keyword "feas_tolerance"</p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">I used feas_tolerance because it is specified in the user manual.</p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both"><br></p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">How can I fix this?</p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both"><br></p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">Thank you for reading my email.</p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both"><br></p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">Best regards,</p><p style="margin:0px;padding:0px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-variant-alternates:inherit;font-stretch:inherit;line-height:inherit;font-kerning:inherit;font-feature-settings:inherit;vertical-align:baseline;box-sizing:inherit;clear:both">Hyemi</p></span><span style="font-size:15px;font-weight:400"><br></span><span style="font-size:15px;font-weight:400"><br></span><span style="font-size:15px;font-weight:400"><br></span><span style="font-size:15px;font-weight:400"><br></span></div></div></div></div>