https://devzone.nordicsemi.com/f/nordic-q-a/51393/module-object-has-no-atrribute-ble_evt_data_length_changedHello Experts, Currently, I run pc-ble-driver-py example with nrf51 dongle,but get one error as below. Anybody know how to fix it,thanksen-USTelligent Community 13Tue, 27 Aug 2019 12:16:01 GMThttps://devzone.nordicsemi.com/thread/206372?ContentTypeID=1Tue, 27 Aug 2019 12:16:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:85b35067-c15d-40b0-81c2-e7526c0fdf12Mttrinh<p>Hi,</p> <p>The constant BLE_EVT_DATA_LENGTH_CHANGED only exist for SD API v3, thus it fails when referenced for SD API v2. You can fix this by commented out these lines of code:&nbsp;<a href="https://github.com/NordicSemiconductor/pc-ble-driver-py/pull/117/commits/62445e12ba60f0ecb609db585c4f36229859d8fc">https://github.com/NordicSemiconductor/pc-ble-driver-py/pull/117/commits/62445e12ba60f0ecb609db585c4f36229859d8fc</a>. This fix have also been merged with the pc-ble-driver-py master branch now.</p><div style="clear:both;"></div>