Hi All, I am getting a .NET error whilst simply trying to get access to the Controls property of a TableLayoutPanel in System.Windows.Forms. I have included a little test application below which demonstrates the issue. I am using Lispworks 5.0 and RDNZL 0.12.0. I am running Visual Studio 2008 so I think I've got version 3.5 of .NET. I've tried to have a look at it but don't understand enough about the ffi to come up with a possible cause. I did look at the System.Windows.Form assembly through the Visual Studio object viewer and I can't see any other definition of Controls. So I really can't see where the ambiguity would come from. Regards, Matthew ;; Bug ;; .NET error (System.Reflection.AmbiguousMatchException): Ambiguous match found. ;; NOTE - Make this point to your RDNZL implementation. (load "../RDNZL/rdnzl-0.12.0/load.lisp") (rdnzl:enable-rdnzl-syntax) (rdnzl:import-types "System.Windows.Forms" "TableLayoutPanel") (rdnzl:use-namespace "System.Windows.Forms") (setf tlp (rdnzl:new "TableLayoutPanel")) (rdnzl:property tlp "Controls")