Edit link doesnt open an edit form

I have imported a database and defined it as an entity type. I can search it through allright but I cannot edit the items. In my view I have an 'edit link', but on that page is also this message:

Notice: Undefined property: stdClass::$IDAccess in data_entity_views_handler_field_edit_link->render() (line 28 of /home/theorich/public_html/sites/all/modules/data/data_entity/views/data_entity_views_handler_field_edit_link.inc).

when I click the link it leads me to http://mysite/admin/content/data/entity/mydatabase/?destination=admin/co...

I read about fieldnames in upper case that might be the problem, but this was mentioned 4 years ago here and besides that I wouldnt know where to alter these (PhpMyadmin and then which table), so any help would be much appreciated.