# UndefVarError after Updating to the Latest Version

**URL:** <https://itensor.discourse.group/t/undefvarerror-after-updating-to-the-latest-version/2108>\
**Category:** ITensor Julia Questions\
**Tags:** mps\
**Created:** [November 7, 2024, 10:57am UTC](https://itensor.discourse.group/t/undefvarerror-after-updating-to-the-latest-version/2108 "2024-11-07T10:57:49Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![mtfishman](https://yyz2.discourse-cdn.com/free1/user_avatar/itensor.discourse.group/mtfishman/32/11_2.png) [@mtfishman](https://itensor.discourse.group/u/mtfishman)\
**Post date:** [November 7, 2024, 12:49pm UTC](https://itensor.discourse.group/t/undefvarerror-after-updating-to-the-latest-version/2108/4 "2024-11-07T12:49:42Z")

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It was announced here: [[ANN] ITensors.jl v0.7 breaking release (MPS/MPO code moved to ITensorMPS.jl)](https://itensor.discourse.group/t/ann-itensors-jl-v0-7-breaking-release-mps-mpo-code-moved-to-itensormps-jl/2089) and also here: [Introduction · ITensors.jl](https://itensor.github.io/ITensors.jl/dev/#News).

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