# MATLABDiffEq load error

**URL:** <https://discourse.julialang.org/t/matlabdiffeq-load-error/29992>\
**Category:** New to Julia\
**Created:** [October 16, 2019, 4:24pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992 "2019-10-16T16:24:19Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Nirvik](https://avatars.discourse-cdn.com/v4/letter/n/8491ac/32.png) [@Nirvik](https://discourse.julialang.org/u/Nirvik)\
**Post date:** [October 16, 2019, 4:24pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992/1 "2019-10-16T16:24:19Z")

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Hi, I was able to add MATLABDiffEq successfully including its dependencies, however while trying out the worked out example in this package i keep getting a ERROR: LoadError: UndefVarError: AlgType not defined Here is a screenshot:

 ![Screenshot%20from%202019-10-15%2019-32-26](https://global.discourse-cdn.com/julialang/original/3X/8/e/8e58d2688a4a13e12092109e3171d5c1c6204ca4.png)  
Please help.  
Thanks

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**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [October 16, 2019, 5:00pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992/2 "2019-10-16T17:00:24Z")

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It might need an update to v1.0.

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**Author:** ![Nirvik](https://avatars.discourse-cdn.com/v4/letter/n/8491ac/32.png) [@Nirvik](https://discourse.julialang.org/u/Nirvik)\
**Post date:** [October 16, 2019, 5:08pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992/3 "2019-10-16T17:08:11Z")

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I am using Julia 1.2.0

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**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [October 16, 2019, 6:05pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992/4 "2019-10-16T18:05:45Z")

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Yes, this package needs an update. I’ll see if I can do it over the next few weeks. It’s not difficult but not the highest priority.

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**Author:** ![Nirvik](https://avatars.discourse-cdn.com/v4/letter/n/8491ac/32.png) [@Nirvik](https://discourse.julialang.org/u/Nirvik)\
**Post date:** [October 16, 2019, 6:13pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992/5 "2019-10-16T18:13:35Z")

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Thanks a lot…I am switching over to Julia from MATLAB for my neuronal simulations so I want to do a benchmark of the stuff solvers with Matlab ode15s. I know ode15s is listed as “low to medium” accuracy in Matlab but I want to see the time and errors against stiff solvers in Julia and fortran.  
I am looking forward to the update eagerly.

Thanks and regards

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<div class="post-metadata">

**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [October 20, 2019, 3:26pm UTC](https://discourse.julialang.org/t/matlabdiffeq-load-error/29992/6 "2019-10-20T15:26:33Z")

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Xref: [https://github.com/JuliaDiffEq/MATLABDiffEq.jl/issues/7](https://github.com/JuliaDiffEq/MATLABDiffEq.jl/issues/7) continuing there.