[me] | But I'm unable to set the Title property of a File object. [Erik] | Is it just the title property? All the others you can fiddle around | with? Try manage_changeProperties() instead. I know (from | lib/python/OFS/Image.py) that the File object has its own | manage_edit() method, you could try that one. Actually it turned out to be a different problem (I work around it now). My form looked something like this: <form action="&dtml-absolute_url;" method="POST" enctype="multipart/form-data"> <input type="hidden" name="id" value="<dtml-var id>"> <input type="text" name="title:text" value="<dtml-var title>"> <input name="change:method" type="submit" value="Change"> </form> and the change method something like this: <dtml-call "manage_editProperties( REQUEST )"> <dtml-call "RESPONSE.redirect('index_html')"> Both the form and the change method would be DTML methods in my containing ZClass object. For my own ZClass subobjects, this worked fine, but for a File subobject it would just show the File instead of running the change method. In the end I had to make the action field in the form tag above include "/change" if the object was a File. Could someone explain this to me? -Magnus