# Error using MimiIWG

**URL:** <https://forum.mimiframework.org/t/error-using-mimiiwg/286>\
**Category:** Uncategorized\
**Created:** [June 16, 2024, 2:22pm UTC](https://forum.mimiframework.org/t/error-using-mimiiwg/286 "2024-06-16T14:22:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![pansah](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@pansah](https://forum.mimiframework.org/u/pansah)\
**Post date:** [June 16, 2024, 2:22pm UTC](https://forum.mimiframework.org/t/error-using-mimiiwg/286/1 "2024-06-16T14:22:52Z")

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Hi,  
Good day! I am following a tutorial that requires MimiIWG. My Julia version is 1.10.4 .

I have already run `registry add https://github.com/mimiframework/MimiRegistry.git`  
and added MimiIWG.  
st shows: Status `~/.julia/environments/v1.10/Project.toml`  
⌃ [b1d80750] MimiIWG v0.1.0  
Info Packages marked with ⌃ have new versions available and may be upgradable.  
I used “up” but it appears there are no new versions for MimiIWG v0.1.0.

Now the main problem that brought me here is that, “using MimiIWG” gives the error:  
"ERROR: The following 1 direct dependency failed to precompile:

MimiIWG [b1d80750-afbf-11e9-0666-4f25b2ea2b65]  
Failed to precompile MimiIWG [b1d80750-afbf-11e9-0666-4f25b2ea2b65] to “/home/peter/.julia/compiled/v1.10/MimiIWG/jl\_fnBWEZ”.  
ERROR: LoadError: UndefVarError: `Simulation` not defined  
Stacktrace: …"

Thanks,  
Peter

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<div class="post-metadata">

**Author:** ![pansah](https://avatars.discourse-cdn.com/v4/letter/p/8dc957/32.png) [@pansah](https://forum.mimiframework.org/u/pansah)\
**Post date:** [June 18, 2024, 9:08pm UTC](https://forum.mimiframework.org/t/error-using-mimiiwg/286/2 "2024-06-18T21:08:51Z")

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Oops! Resolved! Just realized the MimiIWG package requires Julia 1.5.

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**Author:** ![lrennels](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.mimiframework.org/lrennels/32/6_2.png) [@lrennels](https://forum.mimiframework.org/u/lrennels)\
**Post date:** [June 19, 2024, 7:47am UTC](https://forum.mimiframework.org/t/error-using-mimiiwg/286/3 "2024-06-19T07:47:10Z")

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Hi @pansah thank you for your message, I’m glad it’s resolved but we should also bring this model up to running with v1.10. It hasn’t seen use in a bit which is likely why it’s behind, but I’ll add an issue on GitHub and see if the model developers can work on that.

> <https://github.com/rffscghg/MimiIWG.jl/issues/65>
>
> Re comments on the Mimi forum can the developers update this repository to be co…mpatible with Julia 1.10?
> 
> https://forum.mimiframework.org/t/error-using-mimiiwg/286/3