Hi, I'm trying to use a dtml tree tag with an External Method, but it isn't working. The code that I'm using is: <dtml-in obj_fs> -> this is the external Method <dtml-tree branches_expr="objectValues(['Folder','External Method'])" assume_children=1> <dtml-var sequence-item> </dtml-tree> </dtml-in> And the code in obj_fs is: def obj_fs(self): import os, os.path lst=os.listdir("/var/spool/news/articles") return lst What I'm trying with this, is that the zope programme go get me the folders in the directory "/var/spool/news/articles", show those folders and with the tree, it will appear a plus sign that when we click on this plus sign, it will display the subfolders in the folder that we have clicked. The result must be like the Windows Explorer, with folder and subfolders. Is the tree tag compatible with the External Method? If yes, this is not working. Can anyone help me to figure where is the error and tell me another way to can make this result? Please send your answers to: psilva@ruido-visual.pt Thanks, Pedro