Unfortunatelly no luck. I disabled all my content types, lists and SEBLOD modules and still, the page only renderes when the manu item has anything to do with seblod or joomla articles (e.g. newsFeed, Contact etc.). If I disable all the SEBLOD plugins as well , the error message changes to Class 'plgCCK_Storage_LocationJoomla_Article' not found ..... as this location plugin is disabled.
I also tried to search the occurence of "CCK::" and simlar directly in the script files, but also no luck.