highs: fix constr_get_expr (use actual column indices)

rschwarz · rschwarz · commit 7a2624389ed6 · 2023-02-10T09:50:46.000+01:00
diff --git a/mip/highs.py b/mip/highs.py
@@ -659,7 +659,8 @@ def constr_get_expr(self: "SolverHighs", constr: "mip.Constr") -> "mip.LinExpr":
                 )
             )
             expr = mip.xsum(
-                matrix_value[i] * self.model.vars[i] for i in range(num_nz[0])
+                matrix_value[i] * self.model.vars[matrix_index[i]]
+                for i in range(num_nz[0])
             )
 
         # Also set sense and constant

Original file line number	Diff line number	Diff line change
`@@ -659,7 +659,8 @@ def constr_get_expr(self: "SolverHighs", constr: "mip.Constr") -> "mip.LinExpr":`
`659`	`659`	`)`
`660`	`660`	`)`
`661`	`661`	`expr = mip.xsum(`
`662`		`- matrix_value[i] * self.model.vars[i] for i in range(num_nz[0])`
	`662`	`+ matrix_value[i] * self.model.vars[matrix_index[i]]`
	`663`	`+ for i in range(num_nz[0])`
`663`	`664`	`)`
`664`	`665`
`665`	`666`	`# Also set sense and constant`