From 7f90d45d471239fa07f581dc97e28a03600d932e Mon Sep 17 00:00:00 2001
From: fwesselm <fwesselm@mathworks.com>
Date: Tue, 11 Feb 2025 15:24:26 +0100
Subject: [PATCH] Vectors for uplocks and downlocks are not initialized back to
 zero after a restart

---
 src/mip/HighsMipSolverData.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/mip/HighsMipSolverData.cpp b/src/mip/HighsMipSolverData.cpp
index 868737a629..26a15f0a4c 100644
--- a/src/mip/HighsMipSolverData.cpp
+++ b/src/mip/HighsMipSolverData.cpp
@@ -758,8 +758,9 @@ void HighsMipSolverData::runSetup() {
     highsSparseTranspose(model.num_row_, model.num_col_, model.a_matrix_.start_,
                          model.a_matrix_.index_, model.a_matrix_.value_,
                          ARstart_, ARindex_, ARvalue_);
-    uplocks.resize(model.num_col_);
-    downlocks.resize(model.num_col_);
+    // (re-)initialize number of uplocks and downlocks
+    uplocks.assign(model.num_col_, 0);
+    downlocks.assign(model.num_col_, 0);
     for (HighsInt i = 0; i != model.num_col_; ++i) {
       HighsInt start = model.a_matrix_.start_[i];
       HighsInt end = model.a_matrix_.start_[i + 1];