c# - Updating EDMX from SQlite-file fails in VS2012 -

In our project we use a sqlite and EF4.

Updating ADMX was not a propellome under VS2010. Using VS 2012, some types of namespaces are called "none", which have not been seen before. (See screenshot)

As you can see tables can be read but when designing is finished, then hangs with multilingual messages of that type:

• The table 'tbl ...' is referenced by any relationship, but can not be found.

  With the latest system without any changes. Data Cllit installed

  

  < Div class = "post-text" itemprop = "text">

  Is shown in data sources in VS? View Model.edmx as XML (right click -> open it) to see if you have more information.