# EstimatorV2.\_\_init\_\_() got an unexpected keyword argument 'session' **URL:** \ **Category:** PennyLane Qiskit\ **Created:** [September 24, 2024, 7:41pm UTC](https://discuss.pennylane.ai/t/estimatorv2-init-got-an-unexpected-keyword-argument-session/5236 "2024-09-24T19:41:52Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Christophe\_Pere](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/christophe_pere/32/2417_2.png) [@Christophe\_Pere](https://discuss.pennylane.ai/u/Christophe_Pere)\ **Post date:** [September 24, 2024, 7:41pm UTC](https://discuss.pennylane.ai/t/estimatorv2-init-got-an-unexpected-keyword-argument-session/5236/1 "2024-09-24T19:41:52Z")
Hello, I want to upgrade my code and use the 0.38 version of the Qiskit plugin. I ran the code from [The Remote device — PennyLane-Qiskit 0.38.0 documentation](https://docs.pennylane.ai/projects/qiskit/en/stable/devices/remote.html) Code: ```auto from qiskit_ibm_runtime import QiskitRuntimeService from qiskit_ibm_runtime.fake_provider import FakeManilaV2 backend = FakeManilaV2() dev = qml.device( "qiskit.remote", wires=5, backend=backend, resilience_level=1, optimization_level=1, seed_transpiler=42 ) @qml.qnode(dev) def circuit(x, y, z): qml.RZ(z, wires=[0]) qml.RY(y, wires=[0]) qml.RX(x, wires=[0]) qml.CNOT(wires=[0, 1]) return qml.expval(qml.PauliZ(wires=1)) circuit(0.2, 0.1, 0.3) ``` And I got the error: ```auto File ~/pennylane-qiskit/lib/python3.12/site-packages/pennylane_qiskit/qiskit_device.py:646, in QiskitDevice._execute_estimator(self, circuit, session) 643 # the Estimator primitive takes care of diagonalization and measurements itself, 644 # so diagonalizing gates and measurements are not included in the circuit 645 qcirc = [circuit_to_qiskit(circuit, self.num_wires, diagonalize=False, measure=False)] --> 646 estimator = Estimator(session=session) 648 pauli_observables = [mp_to_pauli(mp, self.num_wires) for mp in circuit.measurements] 649 compiled_circuits = self.compile_circuits(qcirc) TypeError: EstimatorV2. __init__ () got an unexpected keyword argument 'session' ``` It’s from the documentation so I don’t know what to do… About qml.about(): ```auto Name: PennyLane Version: 0.38.0 Summary: PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network. Home-page: https://github.com/PennyLaneAI/pennylane Author: Author-email: License: Apache License 2.0 Location: /Users/christophe_pere/pennylane-qiskit/lib/python3.12/site-packages Requires: appdirs, autograd, autoray, cachetools, networkx, numpy, packaging, pennylane-lightning, requests, rustworkx, scipy, toml, typing-extensions Required-by: PennyLane-qiskit, PennyLane_Lightning Platform info: macOS-15.0-arm64-arm-64bit Python version: 3.12.6 Numpy version: 1.26.4 Scipy version: 1.14.1 Installed devices: - qiskit.aer (PennyLane-qiskit-0.38.0) - qiskit.basicaer (PennyLane-qiskit-0.38.0) - qiskit.basicsim (PennyLane-qiskit-0.38.0) - qiskit.remote (PennyLane-qiskit-0.38.0) - lightning.qubit (PennyLane_Lightning-0.38.0) - default.clifford (PennyLane-0.38.0) - default.gaussian (PennyLane-0.38.0) - default.mixed (PennyLane-0.38.0) - default.qubit (PennyLane-0.38.0) - default.qubit.autograd (PennyLane-0.38.0) - default.qubit.jax (PennyLane-0.38.0) - default.qubit.legacy (PennyLane-0.38.0) - default.qubit.tf (PennyLane-0.38.0) - default.qubit.torch (PennyLane-0.38.0) - default.qutrit (PennyLane-0.38.0) - default.qutrit.mixed (PennyLane-0.38.0) - default.tensor (PennyLane-0.38.0) - null.qubit (PennyLane-0.38.0) ``` ---
**Author:** ![Christophe\_Pere](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/christophe_pere/32/2417_2.png) [@Christophe\_Pere](https://discuss.pennylane.ai/u/Christophe_Pere)\ **Post date:** [September 24, 2024, 8:02pm UTC](https://discuss.pennylane.ai/t/estimatorv2-init-got-an-unexpected-keyword-argument-session/5236/2 "2024-09-24T20:02:41Z")
I also tried with my own code and I obtained the same error ```auto File "/Users/christophe_pere/pennylane-qiskit/lib/python3.12/site-packages/pennylane_qiskit/qiskit_device.py", line 646, in _execute_estimator estimator = Estimator(session=session) ^^^^^^^^^^^^^^^^^^^^^^^^^^ TypeError: EstimatorV2. __init__ () got an unexpected keyword argument 'session' ``` I can observe the creation of a session in the IBM Quantum Interface: ![Screenshot 2024-09-24 at 4.01.44 PM](https://canada1.discourse-cdn.com/flex012/uploads/pennylane/original/2X/1/11d9dc32bcf8fdabf2f75cb24be7b98eba2796c1.png) But the message is: ```auto Status details Status Completed completed icon Session marked as not accepting new jobs and all jobs already in a terminal state. ``` ---
**Author:** ![CatalinaAlbornoz](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/catalinaalbornoz/32/1196_2.png) [@CatalinaAlbornoz](https://discuss.pennylane.ai/u/CatalinaAlbornoz)\ **Post date:** [September 25, 2024, 12:06am UTC](https://discuss.pennylane.ai/t/estimatorv2-init-got-an-unexpected-keyword-argument-session/5236/3 "2024-09-25T00:06:33Z")
Hi @Christophe_Pere , My colleague Austin helped me find the source of this issue. It seems like it’s due to a difference in the version of `qiskit_ibm_runtime` . The latest 0.30.0 dev release seems to have broken this keyword. [The documentation](https://docs.quantum.ibm.com/api/qiskit-ibm-runtime/dev/qiskit_ibm_runtime.EstimatorV2) suggests that the keyword should still be useable but they may have broken it accidentally. You can switch to the stable release of qiskit\_ibm\_runtime using `pip install qiskit_ibm_runtime==0.29.0` and the issue should resolve itself. Let me know if this works for you! ---
**Author:** ![Christophe\_Pere](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/christophe_pere/32/2417_2.png) [@Christophe\_Pere](https://discuss.pennylane.ai/u/Christophe_Pere)\ **Post date:** [September 26, 2024, 8:05pm UTC](https://discuss.pennylane.ai/t/estimatorv2-init-got-an-unexpected-keyword-argument-session/5236/4 "2024-09-26T20:05:54Z")
Hi @CatalinaAlbornoz Thanks, it’s working when downgrading to 0.29.