# Please downgrade your version of Autoray if you're running into this issue **URL:** \ **Category:** PennyLane Help\ **Created:** [March 6, 2023, 4:03pm UTC](https://discuss.pennylane.ai/t/please-downgrade-your-version-of-autoray-if-youre-running-into-this-issue/2687 "2023-03-06T16:03:44Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![CatalinaAlbornoz](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/catalinaalbornoz/32/1196_2.png) [@CatalinaAlbornoz](https://discuss.pennylane.ai/u/CatalinaAlbornoz)\ **Post date:** [March 6, 2023, 4:03pm UTC](https://discuss.pennylane.ai/t/please-downgrade-your-version-of-autoray-if-youre-running-into-this-issue/2687/1 "2023-03-06T16:03:44Z")
The latest release of [Autoray](https://github.com/jcmgray/autoray) is unfortunately incompatible with PennyLane v0.29. This is causing the following error: `AttributeError: 'float' object has no attribute 'ndim'` We have made a bugfix release of PennyLane 🎉. You should use PennyLane v0.29.1 to avoid having this error. You can upgrade to the latest release by running: `python -m pip install -U pennylane` ---
**Author:** ![CatalinaAlbornoz](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/catalinaalbornoz/32/1196_2.png) [@CatalinaAlbornoz](https://discuss.pennylane.ai/u/CatalinaAlbornoz)\ **Post date:** [March 6, 2023, 4:04pm UTC](https://discuss.pennylane.ai/t/please-downgrade-your-version-of-autoray-if-youre-running-into-this-issue/2687/2 "2023-03-06T16:04:27Z")
---
**Author:** ![Tom\_Bromley](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/tom_bromley/32/129_2.png) [@Tom\_Bromley](https://discuss.pennylane.ai/u/Tom_Bromley)\ **Post date:** [March 9, 2023, 2:04pm UTC](https://discuss.pennylane.ai/t/please-downgrade-your-version-of-autoray-if-youre-running-into-this-issue/2687/3 "2023-03-09T14:04:56Z")