# Correct calling order for modules and pmap?
**URL:** https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824
**Category:** General Usage
**Created:** [March 19, 2018, 9:05pm UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824 "2018-03-19T21:05:24Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@gideonsimpson](https://discourse.julialang.org/u/gideonsimpson)
#### Post date: [March 19, 2018, 9:05pm UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/1 "2018-03-19T21:05:24Z")
I have a module , `my_module.jl`, which includes functions that I would like to use with `pmap`. Currently, I have tried to execute this like:
```julia
addprocs(4)
include("my_module.jl")
@everywhere function pmap_f(x)
return my_module.g(x)^2
end
xvals = [[x] for x in linspace(0,1)];
gvals = pmap(pmap_f, xvals)
rmprocs(workers())
```
But this just ends up generating an error that my\_module not found in the current path. Can someone offer some guidance about the correct way to set up such a script?
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [March 19, 2018, 9:14pm UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/2 "2018-03-19T21:14:46Z")
Should not it be `@everywhere include...`?
Maybe add
`@everywhere cd("path to my file")`
---
### Author:  [@gideonsimpson](https://discourse.julialang.org/u/gideonsimpson)
#### Post date: [March 19, 2018, 9:30pm UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/3 "2018-03-19T21:30:33Z")
I tried the callling sequence:
```julia
@everywhere cd("/Users/me/path_to_module/")
@everywhere include("my_module.jl")
```
and this ends up generating:
```julia
On worker 7:
UndefVarError: my_module not defined
```
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [March 19, 2018, 9:50pm UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/4 "2018-03-19T21:50:00Z")
This is the error returned by the two above line? It works in serial?
And `@everywhere include("/Users/me/path_to_module/my_module.jl")`?
---
### Author:  [@gideonsimpson](https://discourse.julialang.org/u/gideonsimpson)
#### Post date: [March 20, 2018, 2:31am UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/5 "2018-03-20T02:31:33Z")
Putting the fully qualified path in the `@everywhere include` command resolves this.
---
### Author:  [@gideonsimpson](https://discourse.julialang.org/u/gideonsimpson)
#### Post date: [March 20, 2018, 2:47am UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/6 "2018-03-20T02:47:33Z")
Is there a cleaner way to do this, without having to identify, beforehand, exactly where I am in the filesystem when calling the `include`?
---
### Author:  [@pasha](https://discourse.julialang.org/u/pasha)
#### Post date: [March 20, 2018, 3:04am UTC](https://discourse.julialang.org/t/correct-calling-order-for-modules-and-pmap/9824/7 "2018-03-20T03:04:11Z")
I make all of my projects into a custom module, and softlink (`ln -s` in linux) the development directory into `~/.julia/v0.6` so it shows up as a directory alongside the packages that I’ve loaded from the official sources. Then for parallel I just need to `@everywhere using MyModule` .
There are subtle differences between `using` and `include`, and usually my needs are met with `using`. The other big benefit with `using` is that `Revise.jl` will keep it up to date, at least in the main worker.