diff -r a30455cd0107 -r c3a7ca108705 lemon/cplex.cc
--- a/lemon/cplex.cc	Fri Jan 20 19:16:43 2012 +0100
+++ b/lemon/cplex.cc	Sun May 06 16:46:14 2012 +0200
@@ -437,8 +437,6 @@
     CPXfreeprob(cplexEnv(),&_prob);
     int status;
     _prob = CPXcreateprob(cplexEnv(), &status, "Cplex problem");
-    rows.clear();
-    cols.clear();
   }
 
   void CplexBase::_messageLevel(MessageLevel level) {