Errors in 'migrate from qiskit-ibm-provider'

[SBY13]

URL to the relevant documentation

Migration guides
Section name: Migrate from qiskit_ibm_provider
Paragraph: Example: Basic execution

URL: https://docs.quantum.ibm.com/migration-guides/qiskit-runtime-from-ibm-provider

Select all that apply

• typo
• code bug
• out-of-date content
• broken link
• other

Describe the fix.

I have rewritten a program using qiskit-ibm-provider based on the examples in 'migrate from qiskit-ibm-provider'.

I found that the following part in 'Example: Basic execution' causes error.
print(f" > Counts: {result[0].data.meas.get_counts()}")

The error message is

AttributeError: 'DataBin' object has no attribute 'meas'

And this error is resolved by just replacing 'meas' with 'c':
print(f" > Counts: {result[0].data.c.get_counts()}")

In addition, generate_preset_pass_manager also causes errors as in the attached screenshot, but still works. I have no idea how to fix it.

Enviroments: Google colab. Python 3 Google Compute Engine backend
Versions:

• qiskit-ibm-runtime==0.37.0
• qiskit==2.0.0
• qiskit-aer==0.17.0
• qiskit-ibm-provider==0.11.0

All of the programs related to the error is same with the guides except for quantum circuits.

[abbycross]

Related issue: #2650 - may fix this.

TODO: Double-check that Qiskit Runtime has not changed default name of wires

[kaelynj]

Hi @SBY13, thanks for opening an issue! I tried recreating the error(s) you were getting but didn't get the errors you specified here. Also if you are still using qiskit-ibm-provider you should remove it from your environment (or at least don't use any of its modules) as that package is no longer supported and has been replaced by qiskit-ibm-runtime.

It's this snippet you are referring to, correct?:

from qiskit import QuantumCircuit
from qiskit.transpiler.preset_passmanagers import generate_preset_pass_manager
from qiskit_ibm_runtime import QiskitRuntimeService, SamplerV2 as Sampler
 
service = QiskitRuntimeService()
 
backend = service.least_busy(operational=True, simulator=False, min_num_qubits=127)
 
circuit = QuantumCircuit(2, 2)
circuit.h(0)
circuit.cx(0, 1)
circuit.measure_all()
 
pm = generate_preset_pass_manager(backend=backend, optimization_level=1)
isa_circuit = pm.run(circuit)
 
sampler = Sampler(backend)
job = sampler.run([isa_circuit])
result = job.result()
print(f" > Counts: {result[0].data.meas.get_counts()}")

This runs as expected for me in a fresh python environment.