Dear list, I have a problem using dtml-tree. The page which contains a dtml-tree should show a dynamic parameter, passed with to url calling the dtml-tree-page. page_with_dtml_tree?myparam=yup Before expanding or collapsing the tree, everything works fine. But if I expand or collapse it, this parameter is forgotten. I found the dtml-tree-parameter urlparam, which is included in the expanding and collapsing widget links. <dtml-tree urlparam="myparam=abc"> This works fine with hard coded strings. * But my string is dynamic! * How can I pass it? <dtml-tree urlparam="myparam=<dtml-var myparam>"> produced syntax-errors. Has somebody an idea, how to pass it - or how to work around the problem? Many thanks in advance, Ulla.