diff -r e4ec01f1a4cd -r 852361980706 lemon/lp_soplex.cc
--- a/lemon/lp_soplex.cc	Tue Apr 08 15:16:16 2008 +0000
+++ b/lemon/lp_soplex.cc	Tue Apr 08 16:01:28 2008 +0000
@@ -36,16 +36,33 @@
   LpSoplex::~LpSoplex() {
     delete soplex;
   }
+
+  LpSoplex::LpSoplex(const LpSoplex& lp) : LpSolverBase() {
+    rows = lp.rows;
+    rows.setIdHandler(relocateIdHandler);
+
+    cols = lp.cols;
+    cols.setIdHandler(relocateIdHandler);
+
+    soplex = new soplex::SoPlex;
+    (*static_cast<soplex::SPxLP*>(soplex)) = *(lp.soplex);
+
+    colNames = lp.colNames;
+    invColNames = lp.invColNames;
+
+    primal_value = lp.primal_value;
+    dual_value = lp.dual_value;
+
+  }
   
-  LpSolverBase &LpSoplex::_newLp() {
+  LpSolverBase* LpSoplex::_newLp() {
     LpSoplex* newlp = new LpSoplex();
-    return *newlp;
+    return newlp;
   }
 
-  LpSolverBase &LpSoplex::_copyLp() {
-    LpSoplex* newlp = new LpSoplex();
-    (*static_cast<soplex::SPxLP*>(newlp->soplex)) = *soplex;
-    return *newlp;
+  LpSolverBase* LpSoplex::_copyLp() {
+    LpSoplex* newlp = new LpSoplex(*this);
+    return newlp;
   }
 
   int LpSoplex::_addCol() {