Unable to load the specified metadata resource entity framework - Entity Framework

Few days before I have encountered the error "Unable to load the specified metadata resource entity framework" while loading the application. After changing the connecting string from as defined below my problem got sorted out.

From

connectionString="metadata=res://*/Data.System.csdl|res://*/Data.System.ssdl|res://*/Data.System.msl";

To

connectionString="metadata=res://*/;<remainingpart>