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Code = -997 "Lost connection to the background service"

I have an application in which thousands of API calls give me JSON data that I save in coredata using NSURLSession with BackgroundConfiguration. It works fine, but for some downloads it gives me [code = -1 "unknown error"], and then [Code = -997 "Lost connection to the background transfer service"]. I searched the Internet for possible solutions, but could not find a solution.

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Try checking device logs. You may detect a failure of the Background Transfer daemon. I found that it could fall if the daemon exceeds 40 MB.

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. sdk. GM.:)

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xcode 6.1 SDK 8.1 iOS 8.1.2 8.1.3

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