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nrfutil dfu ble fail

Hi, Nordic

When I use nrfutil dfu ble, it shows:

  File "D:\Program Files\Python27\lib\site-packages\nordicsemi\dfu\dfu_transport_ble.py", line 226, in open
target_device_addr = self.target_device_addr)
 File "D:\Program Files\Python27\lib\site-packages\nordicsemi\dfu\dfu_transport_ble.py", line 122, in connect
self.adapter.enable_notification(conn_handle=self.conn_handle, uuid=DFUAdapter.CP_UUID)
 File "D:\Program Files\Python27\lib\site-packages\wrapt\wrappers.py", line 561, in __call__
args, kwargs)
 File "D:\Program Files\Python27\lib\site-packages\pc_ble_driver_py\ble_driver.py", line 124, in wrapper
err_code = wrapped(*args, **kwargs)
 File "D:\Program Files\Python27\lib\site-packages\pc_ble_driver_py\ble_adapter.py", line 233, in enable_notification
raise NordicSemiException('CCCD not found')
pc_ble_driver_py.exceptions.NordicSemiException: CCCD not found

Plz help me. Same zip, I can use nRF Connect app to DFU, it work fine.

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