android 5.0 lollipop - Bluetooth LE: undocumented error code 19 -

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my android app uses ble apis, , 1 of these apis, bluetoothgattcallback.onconnectionstatechange(), receives undocumented error code 19. i'm using nexus 9.

did ever see error code before? mentioned above, undocumented in android api reference, , don't know it.

p.s.

i searched issue tickets @ android issue tracker also, , found developers encounter undocumented, ble-related error codes often. hmm, grim.


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