diff -r 4bb9e72e1a41 -r 7fdaa05a69a1 lemon/clp.cc
--- a/lemon/clp.cc	Wed Sep 12 17:25:48 2012 +0200
+++ b/lemon/clp.cc	Thu Sep 13 11:56:19 2012 +0200
@@ -437,8 +437,6 @@
   void ClpLp::_clear() {
     delete _prob;
     _prob = new ClpSimplex();
-    rows.clear();
-    cols.clear();
     _col_names_ref.clear();
     _clear_temporals();
   }