From within ArcCatalog, right click the geometric network and go to Properties. Post of screenshot of the General tab so that we can see which feature classes participate in the geometric network. Please also provide a screenshot of the expanded feature dataset containing the geometric network while within ArcCatalog. Also, which user account is being used to connect when attempting to create the geometric network? Does that user have permissions necessary to create the network tables and accompanying database objects?
thanks for your answer i don't have any geometric network yet ,in the images you will find my dataset and in the second image you will find the classes that participate in my geometric network [ATTACH=CONFIG]33802[/ATTACH] [ATTACH=CONFIG]33803[/ATTACH]