An error has been sent on the ANCS Control Point from the iOS Notification Providerhttps://devzone.nordicsemi.com/f/nordic-q-a/28592/an-error-has-been-sent-on-the-ancs-control-point-from-the-ios-notification-providerhello, I use my own code to test IOS message notifications , call nrf_ble_ancs_c_request_attrs function， then did not receive the data source, Triggered the BLE_ANCS_C_EVT_NP_ERROR event。 ask:1.What is the reason triggered the incident 2. How shoulden-USTelligent Community 13Mon, 18 Dec 2017 11:00:06 GMTRE: An error has been sent on the ANCS Control Point from the iOS Notification Providerhttps://devzone.nordicsemi.com/thread/113311?ContentTypeID=1Mon, 18 Dec 2017 11:00:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3d6cc0c8-9744-4119-a24a-926ecda71939run_ar<p>What do you mean? Can you please elaborate?</p><div style="clear:both;"></div>RE: An error has been sent on the ANCS Control Point from the iOS Notification Providerhttps://devzone.nordicsemi.com/thread/113312?ContentTypeID=1Mon, 18 Dec 2017 10:33:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e4bd5ad9-f975-479e-9ea2-cfc887972503Alan<p>Thank you for your answer.</p> <p>The mistake is as follows： p_ble_evt-&gt;evt.gattc_evt.error_handle == p_ancs-&gt;service.control_point_char.handle_value</p><div style="clear:both;"></div>RE: An error has been sent on the ANCS Control Point from the iOS Notification Providerhttps://devzone.nordicsemi.com/thread/113310?ContentTypeID=1Mon, 18 Dec 2017 10:11:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cd74673e-d720-4f57-b812-2d2f6f909d2erun_ar<p>If I&#39;m not mistaken, you should get an additional error code. Please see the ANCS spec <a href="https://developer.apple.com/library/content/documentation/CoreBluetooth/Reference/AppleNotificationCenterServiceSpecification/Specification/Specification.html#//apple_ref/doc/uid/TP40013460-CH1-SW13">here</a>. What is the printed error code?</p><div style="clear:both;"></div>