---
title: ClassicalFunctionParseError (v0.46)
description: API reference for qiskit.circuit.classicalfunction.ClassicalFunctionParseError in qiskit v0.46
source: https://eu-de.quantum.cloud.ibm.com/docs/en/api/qiskit/0.46/qiskit.circuit.classicalfunction.ClassicalFunctionParseError
---

# qiskit.circuit.classicalfunction.ClassicalFunctionParseError

*exception* `qiskit.circuit.classicalfunction.ClassicalFunctionParseError(*message)`

[GitHub](https://github.com/qiskit/qiskit/tree/stable/0.46/qiskit/circuit/classicalfunction/exceptions.py)

ClassicalFunction compiler parse error. The classicalfunction function fails at parsing time.

Set the error message.