catch exceptions in claytonoakes

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lava@1101 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
roxygen...

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lava@1102 edb9625f-4e0d-4859-8d74-9fd3b1da38cb