# Can not add ModelingToolkit.jl to a new package

**URL:** <https://discourse.julialang.org/t/can-not-add-modelingtoolkit-jl-to-a-new-package/61090>\
**Category:** New to Julia\
**Tags:** question, error, modelingtoolkit\
**Created:** [May 13, 2021, 3:17pm UTC](https://discourse.julialang.org/t/can-not-add-modelingtoolkit-jl-to-a-new-package/61090 "2021-05-13T15:17:25Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ohmsweetohm1](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ohmsweetohm1/32/49126_2.png) [@ohmsweetohm1](https://discourse.julialang.org/u/ohmsweetohm1)\
**Post date:** [May 13, 2021, 3:17pm UTC](https://discourse.julialang.org/t/can-not-add-modelingtoolkit-jl-to-a-new-package/61090/1 "2021-05-13T15:17:25Z")

</div>

Running the following file produces an exception:

```julia
module Foo

import ModellingToolkit
import Symbolics

function foo()
    println("hello!")
end

end

Foo.foo()

```

```julia
ERROR: LoadError: ArgumentError: Package ModellingToolkit not found in current path:
- Run `import Pkg; Pkg.add("ModellingToolkit")` to install the ModellingToolkit package.

Stacktrace:
  [1] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:871
  [2] eval
    @ .\boot.jl:360 [inlined]
  [3] include_string(mapexpr::typeof(REPL.softscope), mod::Module, code::String, filename::String)
    @ Base .\loading.jl:1094
  [4] invokelatest(::Any, ::Any, ::Vararg{Any, N} where N; kwargs::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ Base .\essentials.jl:708

```

```julia
julia> versioninfo()
Julia Version 1.6.1
Commit 6aaedecc44 (2021-04-23 05:59 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, skylake)
Environment:
  JULIA_EDITOR = code
  JULIA_NUM_THREADS =

(@v1.6) pkg> st
      Status `.julia\environments\v1.6\Project.toml`
  [961ee093] ModelingToolkit v5.17.0
  [14b8a8f1] PkgTemplates v0.7.16
  [295af30f] Revise v3.1.16
  [0c5d862f] Symbolics v0.1.25

(@v1.6) pkg> 

```

If I comment out `import ModelingToolkit` it works.

---

<div class="post-metadata">

**Author:** ![pdeffebach](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pdeffebach/32/10320_2.png) [@pdeffebach](https://discourse.julialang.org/u/pdeffebach)\
**Post date:** [May 13, 2021, 3:21pm UTC](https://discourse.julialang.org/t/can-not-add-modelingtoolkit-jl-to-a-new-package/61090/2 "2021-05-13T15:21:09Z")

</div>

> [@ohmsweetohm1](#):
>
> ```julia
> ERROR: LoadError: ArgumentError: Package ModellingToolkit not found in current path:
> - Run `import Pkg; Pkg.add("ModellingToolkit")` to install the ModellingToolkit package.
> 
> ```

Did you read the error message closely? Did you run this code to install ModellingToolkit? Also, it has one L, i.e. `ModelingToolkit`.