I do recall having problems outjecting a treemodel from a seam component. I had it working using a managed bean (in faces-config.xml). Now I'm just using a facelets function[1] to convert it (not much use for you I know). I would suggest (a) creating the treemodel in a managed bean and injecting (via configuration in faces-config.xml) the list or (b) creating an extension of the TreeModel componentthat accepts a list and creates a treemodel from it. Sorry for this being vague - but its been a while since I looked at this. It looks to me like Trinidad is soon to release an milestone (m1), at that point I think it would be worth getting together a Seam/trinidad example similar to the icesfaces one. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4006759#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...