Error code 4 in pm_peer_rank_highest()

[Cusko]

In code:

case PM_EVT_BONDED_PEER_CONNECTED:
  NRF_LOG_DEBUG("Connected to previously bonded device\r\n");
  err_code = pm_peer_rank_highest(p_evt->peer_id);

i get err_code=4 if I try pairing with Windows 10. But if I pair with Windows Phone 8.1, I don't get any error. Any idea?

SDK v12.1.0

[Petter Myhre]

Does this also happen if you erase the complete flash, reprogram SoftDevice+application and bond with Windows 10?

[Cusko]

Thanks for solution! Just one question. Where can I expand persistent storage for bonds?