 AerError: 'unknown instruction

ID: aererror-unknown-instruction

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AerError: 'unknown instruction by

Ciro Santilli 37 Updated 2025-07-16

You get an error like this if you forget to call qiskit.transpile():

qiskit_aer.aererror.AerError: 'unknown instruction: QFT'

Related: quantumcomputing.stackexchange.com/questions/34396/aererror-unknown-instruction-c-unitary-while-using-control-unitary-operator/35132#35132

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