# Error with dependency of NetworkDynamics.jl. What to do?

**URL:** <https://discourse.julialang.org/t/error-with-dependency-of-networkdynamics-jl-what-to-do/97978>\
**Category:** General Usage\
**Created:** [April 27, 2023, 12:55am UTC](https://discourse.julialang.org/t/error-with-dependency-of-networkdynamics-jl-what-to-do/97978 "2023-04-27T00:55:08Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![bryaan](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bryaan/32/36858_2.png) [@bryaan](https://discourse.julialang.org/u/bryaan)\
**Post date:** [April 27, 2023, 12:55am UTC](https://discourse.julialang.org/t/error-with-dependency-of-networkdynamics-jl-what-to-do/97978/1 "2023-04-27T00:55:09Z")

</div>

I am trying to run this BlockSystems.jl example but I’m getting an issue with what seems like a dependency of NetworkDynamics.jl.

> <https://github.com/hexaeder/BlockSystems.jl/blob/main/examples/kuramoto_network.jl>

```julia
LoadError: UndefVarError: AllObserved not defined

in expression starting at /Users/bryan/.julia/packages/SciMLBase/QqtZA/src/solutions/solution_interface.jl:2

in expression starting at /Users/bryan/.julia/packages/SciMLBase/QqtZA/src/SciMLBase.jl:1

in expression starting at /Users/bryan/.julia/packages/NetworkDynamics/DDFUM/src/NetworkDynamics.jl:1

1. <mark> **getproperty** (::Module, ::Symbol)</mark>@*Base.jl:31*
2. <mark> **top-level scope** </mark>@*solution_interface.jl:2*
3. <mark> **include** (::Module, ::String)</mark>@*Base.jl:419*
4. <mark> **include** (::String)</mark>@*SciMLBase.jl:1*
5. <mark> **top-level scope** </mark>@*SciMLBase.jl:653*
6. <mark> **include** </mark>@*Base.jl:419* [inlined]
7. <mark> **_require** (::Base.PkgId)</mark>@*loading.jl:1367*
8. <mark> **_require_prelocked** (::Base.PkgId)</mark>@*loading.jl:1200*
9. <mark> **macro expansion** </mark>@*loading.jl:1180* [inlined]
10. <mark> **macro expansion** </mark>@*lock.jl:223* [inlined]
11. <mark> **require** (::Module, ::Symbol)</mark>@*loading.jl:1144*
12. <mark> **include** </mark>@*Base.jl:419* [inlined]
13. <mark> **_require** (::Base.PkgId)</mark>@*loading.jl:1367*
14. <mark> **_require_prelocked** (::Base.PkgId)</mark>@*loading.jl:1200*
15. <mark> **macro expansion** </mark>@*loading.jl:1180* [inlined]
16. <mark> **macro expansion** </mark>@*lock.jl:223* [inlined]
17. <mark> **require** (::Module, ::Symbol)</mark>@*loading.jl:1144*
18. <mark> **top-level scope** </mark>@*[Local: 8](http://localhost:1234/edit?id=2355ac76-e490-11ed-21d2-299be11f8f2d#)*

```

Can someone help me make sense of it and point to the solution?