Error with transfer call

[dinhtrungvn92]

I'm facing with error relate transfer call, logs as below. It worked with Python2.

`Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2895, in _cb_on_call_state _lib._cb_on_call_state(call_id) File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2792, in _cb_on_call_state call._cb.on_state() File "runclient_1.py", line 95, in on_state self.call.transfer("sip:[email protected]") File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 1732, in transfer Lib._create_msg_data(hdr_list)) SystemError: returned NULL without setting an error

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2901, in _cb_on_call_media_state _lib._cb_on_call_media_state(call_id) File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2799, in _cb_on_call_media_state call = self._lookup_call(call_id) File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2738, in _lookup_call return _pjsua.call_get_user_data(call_id) SystemError: returned a result with an error set

The above exception was the direct cause of the following exception:

SystemError: PyEval_EvalFrameEx returned a result with an error set

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File "runclient_1.py", line 187, in lib.destroy() File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2227, in destroy self.handle_events(5) File "/usr/local/lib/python3.6/dist-packages/pjsua.py", line 2259, in handle_events return _pjsua.handle_events(timeout) SystemError: returned a result with an error set`