As of July 1st, following IBM’s expansion of its cloud services, it seems that a major update has been rolled out, upgrading Qiskit to version 2.0. Since then, we have been encountering compatibility issues between Qiskit and other packages.
Specifically, we experienced a hardware connection problem.
According to IBM’s official tutorials, we were able to successfully connect using QiskitRuntimeService and make the backend. However, the issue arises when attempting to access the backend through PennyLane. It appears that there is a dependency conflict between Qiskit and the pennylane-qiskit plugin.
Moreover, we noticed that using the latest GitHub version (0.42-dev) or the official release 0.41.0.post0 of pennylane-qiskit does not resolve the issue. In fact, installing the latest development version via GitHub throws a 404 Not Found error.
We would appreciate it if you could look into the compatibility between Qiskit 2.0 and pennylane-qiskit, and let us know if there are any patches, workarounds, or specific versions we should use to ensure successful integration.
# Put code here
from qiskit_ibm_runtime import QiskitRuntimeService
import pennylane as qml
QiskitRuntimeService.save_account(channel="ibm_quantum_platform",
token="token",
instance="instance",
overwrite=True)
service = QiskitRuntimeService()
backend = service.backend(name='backend')
dev = qml.device("qiskit.remote", wires=127, backend=backend, seed_transpiler=42)
If you want help with diagnosing an error, please put the full error message below:
# Put full error message here
---------------------------------------------------------------------------
HTTPError Traceback (most recent call last)
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/api/session.py:329, in RetrySession.request(self, method, url, bare, **kwargs)
328 response = super().request(method, final_url, headers=headers, **kwargs)
--> 329 response.raise_for_status()
330 except RequestException as ex:
331 # Wrap the requests exceptions into a IBM Q custom one, for
332 # compatibility.
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/requests/models.py:1026, in Response.raise_for_status(self)
1025 if http_error_msg:
-> 1026 raise HTTPError(http_error_msg, response=self)
HTTPError: 401 Client Error: Unauthorized for url: https://auth.quantum-computing.ibm.com/api/users/loginWithToken
The above exception was the direct cause of the following exception:
IBMNotAuthorizedError Traceback (most recent call last)
Cell In[4], line 4
1 from qiskit_ibm_runtime import QiskitRuntimeService
2 import pennylane as qml
----> 4 service = QiskitRuntimeService()
5 backend = service.backend(name='ibm_yonsei')
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/qiskit_runtime_service.py:163, in QiskitRuntimeService.__init__(self, channel, token, url, filename, name, instance, proxies, verify, channel_strategy, private_endpoint)
161 self._validate_channel_strategy()
162 else:
--> 163 auth_client = self._authenticate_ibm_quantum_account(self._client_params)
164 # Update client parameters to use authenticated values.
165 self._client_params.url = auth_client.current_service_urls()["services"]["runtime"]
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/qiskit_runtime_service.py:322, in QiskitRuntimeService._authenticate_ibm_quantum_account(self, client_params)
315 if not version_info["new_api"] or "api-auth" not in version_info:
316 raise IBMInputValueError(
317 "The URL specified ({}) is not an IBM Quantum authentication URL. "
318 "Valid authentication URL: {}.".format(
319 client_params.url, QISKIT_IBM_RUNTIME_API_URL
320 )
321 )
--> 322 auth_client = AuthClient(client_params)
323 service_urls = auth_client.current_service_urls()
324 if not service_urls.get("services", {}).get(SERVICE_NAME):
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/api/clients/auth.py:39, in AuthClient.__init__(self, client_params)
36 self._service_urls = {} # type: ignore[var-annotated]
38 self.auth_api = Api(RetrySession(self.auth_url, **client_params.connection_parameters()))
---> 39 self.base_api = self._init_service_clients(**client_params.connection_parameters())
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/api/clients/auth.py:51, in AuthClient._init_service_clients(self, **request_kwargs)
42 """Initialize the clients used for communicating with the API.
43
44 Args:
(...)
48 Client for the API server.
49 """
50 # Request an access token.
---> 51 self.access_token = self._request_access_token()
52 self.auth_api.session.auth = QuantumAuth(access_token=self.access_token)
53 self._service_urls = self.user_urls()
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/api/clients/auth.py:77, in AuthClient._request_access_token(self)
67 """Request a new access token from the API authentication service.
68
69 Returns:
(...)
74 RequestsApiError: If the request failed.
75 """
76 try:
---> 77 response = self.auth_api.login(self.api_token)
78 return response["id"]
79 except RequestsApiError as ex:
80 # Get the original exception that raised.
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/api/rest/root.py:92, in Api.login(self, api_token)
83 """Login with token.
84
85 Args:
(...)
89 JSON response.
90 """
91 url = self.get_url("login")
---> 92 return self.session.post(url, json={"apiToken": api_token}).json()
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/requests/sessions.py:637, in Session.post(self, url, data, json, **kwargs)
626 def post(self, url, data=None, json=None, **kwargs):
627 r"""Sends a POST request. Returns :class:`Response` object.
628
629 :param url: URL for the new :class:`Request` object.
(...)
634 :rtype: requests.Response
635 """
--> 637 return self.request("POST", url, data=data, json=json, **kwargs)
File ~/miniconda3/envs/qiskit_2/lib/python3.10/site-packages/qiskit_ibm_runtime/api/session.py:350, in RetrySession.request(self, method, url, bare, **kwargs)
348 message += f". {ex.response.text}"
349 if status_code == 401:
--> 350 raise IBMNotAuthorizedError(message) from ex
351 raise RequestsApiError(message, status_code) from ex
353 return response
IBMNotAuthorizedError: '401 Client Error: Unauthorized for url: https://auth.quantum-computing.ibm.com/api/users/loginWithToken. Login failed., Error code: 3446.'
.
.