I have VS2012 and the latest 32-bit version of ODAC (version 5 with Oracle developer tools) installed in a Win7 window. All this is a clean installation. In this environment, I have an ASP.NET Web Forms solution that was originally developed in VS2010 with EDMX files that were built on the 32-bit version of ODAC Release 4.
I can configure database connections and browse tables using Server Explorer , but now I cannot change my EDMX files using the update wizard . In the Update Wizard, tables will not be displayed.

Here is the connection string from the first step of the VS2012 Update Wizard:
metadata=res://*/Models.EventModel.EventModel.csdl|
res://*/Models.EventModel.EventModel.ssdl|
res://*/Models.EventModel.EventModel.msl;
provider=Oracle.DataAccess.Client;
provider connection string="data source=<serverid>;
persist security info=True;
user id=<userid>"
Win7 VS2010, EF 4.1 32- ODAC ( 4) ASP.NET, Update .

VS2010 ODAC4:
metadata=res://*/Models.EventModel.EventModel.csdl|
res://*/Models.EventModel.EventModel.ssdl|
res://*/Models.EventModel.EventModel.msl;
provider=Oracle.DataAccess.Client;
provider connection string="DATA SOURCE=<serverid>;
PASSWORD=;
PERSIST SECURITY INFO=True";
USER ID=<userid>"
:
1) web.config VS2010/ODAC4 VS2012/ODAC5.
2) VS2012 .NET 4.5.
3) , EF5 NuGet, VS2012.
4) VS2010 ODAC5, . .
:
- web.config , ? , ?
. ODAC VS2012.