# ParallelDataTransfer.jl with local variables
**URL:** https://discourse.julialang.org/t/paralleldatatransfer-jl-with-local-variables/110916
**Category:** General Usage
**Tags:** package, distributed
**Created:** [February 28, 2024, 6:52pm UTC](https://discourse.julialang.org/t/paralleldatatransfer-jl-with-local-variables/110916 "2024-02-28T18:52:44Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@lgo](https://discourse.julialang.org/u/lgo)
#### Post date: [February 28, 2024, 6:52pm UTC](https://discourse.julialang.org/t/paralleldatatransfer-jl-with-local-variables/110916/1 "2024-02-28T18:52:44Z")
I want to pass a variable to my workers inside a function (see minimum example below) but I get stuck on passobj. I assume this is because passobj is evaluated at the global scope where the variable is not defined? Is there any way to get this to work?
I work on 0.5.1 for ParallelDataTransfer and Julia 1.8.4.
> using Distributed
> addprocs(4)
>
> @everywhere using Distributed, ParallelDataTransfer
>
> function testPass(a::Vector{Float64})
> passobj(1, workers(), [:a])
> end
>
> testPass(rand(10))
---
### Author:  [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [February 28, 2024, 7:49pm UTC](https://discourse.julialang.org/t/paralleldatatransfer-jl-with-local-variables/110916/2 "2024-02-28T19:49:13Z")
> [@lgo](#):
>
> I want to pass a variable to my workers inside a function (see minimum example below) but I get stuck on passobj. I assume this is because passobj is evaluated at the global scope where the variable is not defined? Is there any way to get this to work?
You cannot pass to a local function because that is global dynamic data. What you can do is pass it to a worker that then reads that information in a function by using a global variable. So you’d do:
```julia
function f(x)
x + a
end
```
and if you send `a` to your worker then it can update the global `a`. You can that get more sophisticated if you can reference and update the reference after the send.