# Chart image node error
**URL:** https://discourse.nodered.org/t/chart-image-node-error/44739
**Category:** General
**Created:** [26 April 2021 09:56 UTC](https://discourse.nodered.org/t/chart-image-node-error/44739 "2021-04-26T09:56:17Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Folgore](https://discourse.nodered.org/u/Folgore)
#### Post date: [26 April 2021 09:56 UTC](https://discourse.nodered.org/t/chart-image-node-error/44739/1 "2021-04-26T09:56:17Z")
Hi @gemini86 , Sorry for the disturb. I have installed your node and I have 2 question.
1. Is possible save the image how file (the output is a buffer) with file node?
2. I have try your exapmple ([[SOLVED] Using node-red-contrib-chart-image](https://discourse.nodered.org/t/solved-using-node-red-contrib-chart-image/35300)) but receive even a error in debug tab.
```auto
"TypeError: CanvasRenderService is not a constructor"
```
I miss something?
Thanks a lot
---
### Author:  [@nygma2004](https://discourse.nodered.org/u/nygma2004)
#### Post date: [19 May 2021 08:20 UTC](https://discourse.nodered.org/t/chart-image-node-error/44739/2 "2021-05-19T08:20:43Z")
I am also interested in this, because I am using this quite a lot. I even made a video on this and in the comment I was told the same. Something appears to have changed in the canvas.
Now I am afraid to update canvas.
To be honest, I would also be interested of using canvas in a function node to dynamically generate and image.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [18 July 2021 08:21 UTC](https://discourse.nodered.org/t/chart-image-node-error/44739/3 "2021-07-18T08:21:06Z")
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