getting ADBannerView error message
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I am creating ADBannerView in my IPhone app Programmatically,

can anybody say me that,

why I am geeting this message in my console,

ADBannerView: Unhandled error (no delegate or delegate does not implement didFailToReceiveAdWithError:): Error Domain=ADErrorDomain Code=3 "The operation couldn’t be completed. Ad inventory unavailable" UserInfo=0xb5328d0 {ADInternalErrorCode=3, NSLocalizedFailureReason=Ad inventory unavailable}