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I am using Devforce 2010 6.1.15 with Intersoft UI Controls to create a WPF app. Prior to the middle of the day yesterday my application was working just fine, reading and processing data. Last night i was working on the code and built the latest version and started it up in Visual Studio 2012 using .net 4.0. As soon as i entered the username and password in the login window and called my ValidateLogin routine, I received the above error. Prior to this call there is no data call to retreive data so i know i cannot have a duplicate key value in the cache. So I commented out the call to validate the login. I ran the program again. The very next call to my Repository which is using my entity manager to call an ExecuteQuery I get the above error. I commented out the call to that line. The next call to my repository and a line using the entity manager to execute a query also caused that error. All my calls to my repository class and then any call to the entity manager and trying to run a query i get that error message. In design mode, I can connect to the database and see my model on the screen. I see my entities in the model browser. Validate the model produces no errors. I can refresh the model from the database. Any suggestions? I am out of ideas. My query strategy is set to normal. As i said it was working fine and then this occured. Could my domain model be corrupted? Obvkously every call to retrieve data in a query can't be multiple keys in the cache. So i am assuming this can be a spurious error and refer to some other problem. Bill
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