From 7503e0784a4ad6dfd1aa603ce8d83303f3c1c8e3 Mon Sep 17 00:00:00 2001
From: Ted Ralphs <ted@lehigh.edu>
Date: Mon, 11 May 2020 15:30:53 -0400
Subject: [PATCH] Fix for matrix read in from MPS file

---
 src/cuppy/cuttingPlanes.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/cuppy/cuttingPlanes.py b/src/cuppy/cuttingPlanes.py
index 62b26b3..8eb2fe0 100644
--- a/src/cuppy/cuttingPlanes.py
+++ b/src/cuppy/cuttingPlanes.py
@@ -335,7 +335,10 @@ def solve(m, whichCuts = [], use_cglp = False, debug_print = False, eps = EPS,
     else:
         b = m.lp.constraintsLower.copy()
         mult = 1.0
-    A = m.A.copy()
+    if type(m.A) == csc_matrixPlus:
+        A = m.A.toarray()
+    else:
+        A = m.A.copy()
     for i in range(m.lp.nCols):
         e = np.zeros((1, m.lp.nCols))
         if m.lp.variablesUpper[i] < infinity: