# Error sending packages to other workers (parallelization)

**URL:** <https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851>\
**Category:** General Usage\
**Created:** [January 20, 2019, 8:20pm UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851 "2019-01-20T20:20:48Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![juliauser](https://avatars.discourse-cdn.com/v4/letter/j/46a35a/32.png) [@juliauser](https://discourse.julialang.org/u/juliauser)\
**Post date:** [January 20, 2019, 8:20pm UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/1 "2019-01-20T20:20:48Z")

</div>

Hi,  
In previous versions of julia I used to run

using Distributed  
addprocs(3)  
@everywhere using Distributions

where Distributions is just one example of a package. Now I get this error

On worker 2:  
ArgumentError: Package Distributions not found in current path:

- Run `import Pkg; Pkg.add("Distributions")` to install the Distributions package.

How can I send packages to other workers in Juia 1.?

Thank you

---

<div class="post-metadata">

**Author:** ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)\
**Post date:** [January 20, 2019, 10:10pm UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/2 "2019-01-20T22:10:32Z")

</div>

Can’t reproduce:

```julia
julia> using Distributed

julia> addprocs(3)
3-element Array{Int64,1}:
 2
 3
 4

julia> @everywhere using Distributions

julia> remotecall_fetch(rand, 2, Normal(5,5))
8.680947219352166

julia> versioninfo()
Julia Version 1.0.3
Commit 099e826241 (2018-12-18 01:34 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.0 (ORCJIT, haswell)

```

What does `using Distributions` return if you try without `@everywhere`?

---

<div class="post-metadata">

**Author:** ![ajkeith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ajkeith/32/970_2.png) [@ajkeith](https://discourse.julialang.org/u/ajkeith)\
**Post date:** [March 1, 2019, 9:41pm UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/3 "2019-03-01T21:41:09Z")

</div>

Distributions works for me, but I have the same problem with OnlineStats, with and without the `@everywhere` macro.

If I don’t use `addprocs()`, I can load OnlineStats fine:

```julia
julia> using Pkg; Pkg.activate("C:\\Users\\op\\Documents\\Julia Projects\\StrategyGames")
"C:\\Users\\op\\Documents\\Julia Projects\\StrategyGames\\Project.toml"

julia> using Distributed

julia> using OnlineStats

```

Starting a fresh Julia session and using `addprocs()`, I get the same error as juliauser.

```julia
julia> using Pkg; Pkg.activate("C:\\Users\\op\\Documents\\Julia Projects\\StrategyGames")
"C:\\Users\\op\\Documents\\Julia Projects\\StrategyGames\\Project.toml"

julia> using Distributed; addprocs(2)
2-element Array{Int64,1}:
 2
 3

julia> using OnlineStats
ERROR: On worker 2:
ArgumentError: Package OnlineStats [a15396b6-48d5-5d58-9928-6d29437db91e] is required but does not seem to be installed:
 - Run `Pkg.instantiate()` to install all recorded dependencies.

_require at .\loading.jl:929
require at .\loading.jl:858
#2 at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\Distributed.jl:77
#116 at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\process_messages.jl:276
run_work_thunk at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\process_messages.jl:56
run_work_thunk at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\process_messages.jl:65
#102 at .\task.jl:259
#remotecall_wait#154(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Function, ::Distributed.Worker) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\remotecall.jl:421
remotecall_wait(::Function, ::Distributed.Worker) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\remotecall.jl:412
#remotecall_wait#157(::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Function, ::Int64) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\remotecall.jl:433
remotecall_wait(::Function, ::Int64) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\remotecall.jl:433
(::getfield(Distributed, Symbol("##1#3")){Base.PkgId})() at .\task.jl:259

...and 1 more exception(s).

Stacktrace:
 [1] sync_end(::Array{Any,1}) at .\task.jl:226
 [2] macro expansion at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\Distributed.jl:75 [inlined]
 [3] macro expansion at .\task.jl:244 [inlined]
 [4] _require_callback(::Base.PkgId) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.0\Distributed\src\Distributed.jl:74
 [5] #invokelatest#1 at .\essentials.jl:697 [inlined]
 [6] invokelatest at .\essentials.jl:696 [inlined]
 [7] require(::Base.PkgId) at .\loading.jl:861
 [8] macro expansion at .\logging.jl:309 [inlined]
 [9] require(::Module, ::Symbol) at .\loading.jl:840

```

Here’s my version info:

```julia
julia> versioninfo()
Julia Version 1.0.2
Commit d789231e99 (2018-11-08 20:11 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.0 (ORCJIT, skylake)
Environment:
  JULIA_NUM_THREADS = 1

```

As far as I can tell I’m following the documentation from the [manual](https://docs.julialang.org/en/v1.0/manual/parallel-computing/). Should I submit an issue to `Distributed` and/or `OnlineStats`?

---

<div class="post-metadata">

**Author:** ![anon43133060](https://avatars.discourse-cdn.com/v4/letter/a/57b2e6/32.png) [@anon43133060](https://discourse.julialang.org/u/anon43133060)\
**Post date:** [March 2, 2019, 5:12am UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/4 "2019-03-02T05:12:16Z")

</div>

[quote=“ajkeith, post:3, topic:19851”]  
Pkg.activate(“C:\Users\op\Documents\Julia Projects\StrategyGames”) [/quote]

What if you add

```julia
@everywhere using Pkg
@everywhere Pkg.activate("C:\\Users\\op\\Documents\\Julia Projects\\StrategyGames")

```

after `using Distributed; addprocs(2)` ?

I think the workers do not have to right project activated.

---

<div class="post-metadata">

**Author:** ![ajkeith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ajkeith/32/970_2.png) [@ajkeith](https://discourse.julialang.org/u/ajkeith)\
**Post date:** [March 2, 2019, 9:29am UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/5 "2019-03-02T09:29:02Z")

</div>

I’ll try in a bit, but I’m pretty sure that Distributions is in the same project and not in the StdLib

---

<div class="post-metadata">

**Author:** ![ajkeith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ajkeith/32/970_2.png) [@ajkeith](https://discourse.julialang.org/u/ajkeith)\
**Post date:** [March 4, 2019, 5:54pm UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/6 "2019-03-04T17:54:00Z")

</div>

Thanks @anon43133060! That fixed it.

Earlier I had tried using

```julia
@everywhere using Pkg; Pkg.activate("C:\\Users\\op\\Documents\\Julia Projects\\StrategyGames")

```

But clearly, in hindsight, that means I wasn’t applying the `@everywhere` macro to the `Pkg.activate` command after the semicolon.

---

<div class="post-metadata">

**Author:** ![anon43133060](https://avatars.discourse-cdn.com/v4/letter/a/57b2e6/32.png) [@anon43133060](https://discourse.julialang.org/u/anon43133060)\
**Post date:** [March 4, 2019, 6:04pm UTC](https://discourse.julialang.org/t/error-sending-packages-to-other-workers-parallelization/19851/7 "2019-03-04T18:04:03Z")

</div>

Relevant issue with other workarounds here:  
[https://github.com/JuliaLang/julia/issues/28781](https://github.com/JuliaLang/julia/issues/28781)