diff -r 4bb9e72e1a41 -r 7fdaa05a69a1 lemon/cplex.cc
--- a/lemon/cplex.cc	Wed Sep 12 17:25:48 2012 +0200
+++ b/lemon/cplex.cc	Thu Sep 13 11:56:19 2012 +0200
@@ -470,8 +470,6 @@
     CPXfreeprob(cplexEnv(),&_prob);
     int status;
     _prob = CPXcreateprob(cplexEnv(), &status, "Cplex problem");
-    rows.clear();
-    cols.clear();
   }
 
   void CplexBase::_messageLevel(MessageLevel level) {