# QuantumFunctionError

**URL:** <https://discuss.pennylane.ai/t/quantumfunctionerror/108>\
**Category:** PennyLane Help\
**Created:** [March 27, 2019, 8:43pm UTC](https://discuss.pennylane.ai/t/quantumfunctionerror/108 "2019-03-27T20:43:54Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![theodor](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/theodor/32/178_2.png) [@theodor](https://discuss.pennylane.ai/u/theodor)\
**Post date:** [February 12, 2021, 7:59pm UTC](https://discuss.pennylane.ai/t/quantumfunctionerror/108/5 "2021-02-12T19:59:49Z")

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Hi @sassan_moradi,

Yes, this circuit wouldn’t be possible to run due to using the continuous variable operation `qml.X` with other qubit operations. I hope [my reply in the other thread](http://discuss.pennylane.ai/t/control-of-a-quantum-state/796/10) can help you out. Otherwise, feel free to keep asking us questions.

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