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Fail to update model from oracle database using EF 5 and VS 2017

7c8085d9-1be0-441f-bc61-bb1f077f4d71Dec 14 2017 — edited Dec 14 2017

I have a C# application using Oracle database and Entity Framework 5. Oracle client is version 12c. My application uses database first approach. I'm trying to run the app using Visual Studio Professional 2017. When I access the edmx file and I try to update the model from the database, it gives me the following error

exception of type 'System.ArgumentException' occurred while attempting to update from the database. The exception message is: 'Unable to convert runtime connection string to its design-time equivalent. The libraries required to enable Visual Studio to communicate with the database for design purposes (DDEX provider) are not installed for provider 'Oracle.DataAccess.Client'. Connection string: XXXXX.

i have already installed oracle developer tool for visual studio 2017
Please help me to solve this issue

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Added on Dec 14 2017

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