# Error: I am trying to use MPSDynamics (in Julia 1.12.1), but got an error

**URL:** https://discourse.julialang.org/t/error-i-am-trying-to-use-mpsdynamics-in-julia-1-12-1-but-got-an-error/133532
**Category:** New to Julia
**Tags:** question
**Created:** [October 30, 2025, 1:58am UTC](https://discourse.julialang.org/t/error-i-am-trying-to-use-mpsdynamics-in-julia-1-12-1-but-got-an-error/133532 "2025-10-30T01:58:57Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Anil\_Kumar](https://avatars.discourse-cdn.com/v4/letter/a/f05b48/32.png) [@Anil\_Kumar](https://discourse.julialang.org/u/Anil_Kumar)
#### Post date: [October 30, 2025, 1:58am UTC](https://discourse.julialang.org/t/error-i-am-trying-to-use-mpsdynamics-in-julia-1-12-1-but-got-an-error/133532/1 "2025-10-30T01:58:57Z")

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I didn’t use Julia for quite a long time. But I usually work in Python (qutip, etc). Here is the error I got during the installation of MPSDynamics.  
(@v1.12) pkg\> add MPSDynamics  
Resolving package versions…  
ERROR: Unsatisfiable requirements detected for package LinearAlgebra [37e2e46d]:  
LinearAlgebra [37e2e46d] log:  
├─possible versions are: 1.12.0 or uninstalled (package in sysimage!)  
├─restricted to versions \* by project [ad223d06], leaving only versions: 1.12.0  
│ └─project [ad223d06] log:  
│ ├─possible versions are: 0.0.0 or uninstalled  
│ └─project [ad223d06] is fixed to version 0.0.0  
└─found to have no compatible versions left with MPSDynamics [8fc8f346]  
└─MPSDynamics [8fc8f346] log:  
├─possible versions are: 1.1.0 - 1.2.0 or uninstalled  
└─restricted to versions \* by an explicit requirement, leaving only versions: 1.1.0 - 1.2.0

Thanks in advance for any hints.

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<div class="post-metadata">

### Author: ![ufechner7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ufechner7/32/51363_2.png) [@ufechner7](https://discourse.julialang.org/u/ufechner7)
#### Post date: [October 30, 2025, 2:55am UTC](https://discourse.julialang.org/t/error-i-am-trying-to-use-mpsdynamics-in-julia-1-12-1-but-got-an-error/133532/2 "2025-10-30T02:55:08Z")

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As you can see here: [MPSDynamics.jl/Project.toml at master · shareloqs/MPSDynamics.jl · GitHub](https://github.com/shareloqs/MPSDynamics.jl/blob/master/Project.toml)

MPSDynamics is not compatible with Julia 1.12 yet.

Please, create an issue at [GitHub · Where software is built](https://github.com/shareloqs/MPSDynamics.jl/issues) and use Julia 1.11 for now by typing:

```julia-auto
juliaup add 1.11
juliaup default 1.11

```