diff -r caf16813b1e8 -r 1782aa72495a lemon/lp_skeleton.cc
--- a/lemon/lp_skeleton.cc	Sat Jul 21 10:18:57 2012 +0200
+++ b/lemon/lp_skeleton.cc	Fri Jul 20 17:09:01 2012 +0200
@@ -91,6 +91,8 @@
 
   void SkeletonSolverBase::_messageLevel(MessageLevel) {}
 
+  void SkeletonSolverBase::_write(std::string, std::string) const {}
+
   LpSkeleton::SolveExitStatus LpSkeleton::_solve() { return SOLVED; }
 
   LpSkeleton::Value LpSkeleton::_getPrimal(int) const { return 0; }