6b_process_tomography.ipynb legacy tutorial raises exception

[nonhermitian]

On Qiskit 0.19.6, this tutorial raises the following exception:

QiskitError: 'channel is not completely-positive'

[brosand]

I'm also experiencing this issue, are there any updates? The error is generated when I try to obtain the process fidelity (but not the state fidelity) from the tomography data

[ShellyGarion]

this issue was handled in #1026

[Eric-Arellano]

This tutorial no longer exists in this repo -- and sounds like it was fixed by https://github.com/Qiskit/qiskit-tutorials/pull/1026