# CoupledODEs not defined

**URL:** <https://discourse.julialang.org/t/coupledodes-not-defined/102343>\
**Category:** New to Julia\
**Tags:** question, package, dynamical-systems\
**Created:** [August 1, 2023, 8:27am UTC](https://discourse.julialang.org/t/coupledodes-not-defined/102343 "2023-08-01T08:27:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tamojit\_Ghosh](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tamojit_ghosh/32/51989_2.png) [@Tamojit\_Ghosh](https://discourse.julialang.org/u/Tamojit_Ghosh)\
**Post date:** [August 1, 2023, 8:27am UTC](https://discourse.julialang.org/t/coupledodes-not-defined/102343/1 "2023-08-01T08:27:23Z")

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My CoupledODEs function suddenly stopped working. I have DyanamicalSystems Package installed. It is showing error:  
“UndefVarError: `CoupledODEs` not defined”

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<div class="post-metadata">

**Author:** ![KalelR](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kalelr/32/43305_2.png) [@KalelR](https://discourse.julialang.org/u/KalelR)\
**Post date:** [August 1, 2023, 11:01am UTC](https://discourse.julialang.org/t/coupledodes-not-defined/102343/2 "2023-08-01T11:01:36Z")

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Hey

That’s strange. Did you import it? Like

`using DynamicalSystems`

should work.

Otherwise, please try updating the package, like

```julia
using Pkg
Pkg.update("DynamicalSystems")

```