# Problem with global.get in a function
**URL:** https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621
**Category:** General
**Created:** [1 September 2024 16:42 UTC](https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621 "2024-09-01T16:42:32Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@irotier](https://discourse.nodered.org/u/irotier)
#### Post date: [1 September 2024 16:42 UTC](https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621/1 "2024-09-01T16:42:32Z")
I tried several hours to work with a global (and persistant) variable. After many tries i realized, that everything works fine, when i'm using context, saved as memoryOnly, but it doesn't if i try to use a global context wich is saved to file...
I've followed the NodeRed docs and used this in my settings.js:
```auto
contextStorage: {
default: "memoryOnly",
memoryOnly: { module: 'memory' },
file: { module: 'localfilesystem' }
}
```
If i now create a global Variable with this function:
```auto
global.set("lightsPower",msg.payload);
return msg;
```
i can read and use it like this:
```auto
var M = global.get("lightsPower");
msg.payload = M;
return msg;
```
But if i create it with a change-node and select file instead of memoryOnly as destination (?!) i can't get it, no matter what i tried.
Do i need to point to the filesystem in anyway?
---
### Author:  [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)
#### Post date: [1 September 2024 17:16 UTC](https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621/2 "2024-09-01T17:16:59Z")
Have you re-started node-RED since editing the settings.js file? It needs a restart to read in the new setting.
What do you get with this?
```auto
If you now create a global Variable with this function:
global.set("lightsPower",msg.payload, "file");
return msg;
can you read and use it like this:
var M = global.get("lightsPower", "file");
msg.payload = M;
return msg;
```
---
### Author:  [@E1cid](https://discourse.nodered.org/u/E1cid)
#### Post date: [1 September 2024 17:24 UTC](https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621/3 "2024-09-01T17:24:32Z")
> [@irotier](#):
>
> I've followed the NodeRed docs and used this in my settings.js:
It is a bit hidden, as the info you required is in the docs under Writing Functions Guide.
[https://nodered.org/docs/user-guide/writing-functions#multiple-context-stores](https://nodered.org/docs/user-guide/writing-functions#multiple-context-stores)
Link is just below Using Context in a Flow.
[https://nodered.org/docs/user-guide/context#using-context-in-a-flow](https://nodered.org/docs/user-guide/context#using-context-in-a-flow)
---
### Author:  [@irotier](https://discourse.nodered.org/u/irotier)
#### Post date: [1 September 2024 17:30 UTC](https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621/4 "2024-09-01T17:30:36Z")
> [@Paul-Reed](#):
>
> ```auto
> var M = global.get("lightsPower", "file");
>
> ```
This solved it - the section "file" was missing ... thanks a lot!
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [15 September 2024 17:31 UTC](https://discourse.nodered.org/t/problem-with-global-get-in-a-function/90621/5 "2024-09-15T17:31:03Z")
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