I'm trying to run a series of circuits in a job and I keep getting this error message which I haven't been able to find the meaning of anywhere in qiskit's documentation, online, etc. The job appears to run for 15 minutes and only then does an error appear... Anyone have any clue as to what this could be? The job consists of batches of circuits where each batch is just a certain circuit repeated a different number of times (before measurement), so I don't see any obvious reason why the circuits from one batch work fine but not from another. Error message

  • $\begingroup$ If you're on Slack, we can talk more about this error by DM if you want, my name there is Léna Pérennès, display name Léna :) $\endgroup$
    – Lena
    Dec 6, 2021 at 16:10

1 Answer 1


The list of API error codes is here: https://quantum-computing.ibm.com/lab/docs/iql/manage/errors

However, for 9999, the answer is not very satisfying:

Contact IBM Quantum via Slack for help.

Once there, checkout out the channel #ibm-q-systems.

In my experience, it is usually a temporary problem and you can try again later. But the "something went wrong" description is not very useful.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.