From 55693c2067b60819ff16edab78fdab62713f74bc Mon Sep 17 00:00:00 2001
From: Gleb Belov <gleb@ampl.com>
Date: Mon, 27 May 2024 19:50:34 +1000
Subject: [PATCH] Multi-obj: Copt #239

---
 solvers/copt/coptmodelapi.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/solvers/copt/coptmodelapi.cc b/solvers/copt/coptmodelapi.cc
index 12919b834..50849e825 100644
--- a/solvers/copt/coptmodelapi.cc
+++ b/solvers/copt/coptmodelapi.cc
@@ -17,6 +17,9 @@ void CoptModelAPI::SetLinearObjective( int iobj, const LinearObjective& lo ) {
   if (iobj<1) {
     COPT_CCALL(COPT_SetObjSense(lp(), 
                     obj::Type::MAX==lo.obj_sense() ? COPT_MAXIMIZE : COPT_MINIMIZE) );
+    double zero_out = 0.0;
+    for (int i=NumVars(); i--; )
+      COPT_CCALL(COPT_SetColObj(lp(), 1, &i, &zero_out));
     COPT_CCALL(COPT_SetColObj(lp(), lo.num_terms(),
                            lo.vars().data(), lo.coefs().data()) );
   } else {