Hi Oliver, this seems to be the same error already reported in [1]. According to [2] it is fixed in the SVN and will be contained in the next release. Ciao Christoph [1] http://lists.dune-project.org/pipermail/dune/2012-May/011171.html [2] http://lists.dune-project.org/pipermail/dune/2012-May/011173.html