# ArgumentError: u names not unique. Repeated names:

**URL:** <https://discourse.julialang.org/t/argumenterror-u-names-not-unique-repeated-names/107386>\
**Category:** Modelling & Simulations\
**Tags:** controlsystems\
**Created:** [December 10, 2023, 8:02pm UTC](https://discourse.julialang.org/t/argumenterror-u-names-not-unique-repeated-names/107386 "2023-12-10T20:02:08Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![DNF](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dnf/32/10191_2.png) [@DNF](https://discourse.julialang.org/u/DNF)\
**Post date:** [December 10, 2023, 9:27pm UTC](https://discourse.julialang.org/t/argumenterror-u-names-not-unique-repeated-names/107386/5 "2023-12-10T21:27:28Z")

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I’m afraid it is very difficult to understand what you are asking about. What packages are you using? Please include fully runnable code with _all_ the necessary `using` or `import` statements.

I’m afraid the thread title itself is far from self-explanatory. In general, it is recommended to read the following post, which can help write questions in a clear way:

> [@Please read: make it easier to help you](https://discourse.julialang.org/t/please-read-make-it-easier-to-help-you/14757):
>
> Welcome to the Julia Discourse! We are enthusiastic about helping Julia programmers, both beginner and experienced. This public service announcement (PSA) outlines best practices when asking for help. Following these points makes it easier for us to help you and more likely you’ll get a prompt, useful answer. Keywords are highlighted to make it easier to refer to specific points. Choose a descriptive title that captures the key part of your question, eg “plots with multiple axes” instead of …

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_[View the full topic](https://discourse.julialang.org/t/argumenterror-u-names-not-unique-repeated-names/107386)._