# Filename prefix on save image nodes via concatenate node

**URL:** <https://forum.comfy.org/t/filename-prefix-on-save-image-nodes-via-concatenate-node/2899>\
**Category:** Custom Nodes\
**Tags:** issue\
**Created:** [June 20, 2025, 9:54am UTC](https://forum.comfy.org/t/filename-prefix-on-save-image-nodes-via-concatenate-node/2899 "2025-06-20T09:54:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![alFrame](https://yyz1.discourse-cdn.com/flex009/user_avatar/forum.comfy.org/alframe/32/689_2.png) [@alFrame](https://forum.comfy.org/u/alFrame)\
**Post date:** [June 20, 2025, 9:54am UTC](https://forum.comfy.org/t/filename-prefix-on-save-image-nodes-via-concatenate-node/2899/1 "2025-06-20T09:54:02Z")

</div>

I have a problem with setting filename prefix. Whatever Image Save node I use (core, or extra nodes), it seems that we cannot pipe the filename by using nodes like the tinyterra node called “3x TXT Loader MultiConcat”.

Especially things like %node\_name.widget\_name% are written out in the filename and are not “translated” into the node\_names and widget values.

I have tried numerous things, to no avail. I wonder if this is a known limitation?

Attached is a screenshot. I’d appreciate any help on this.

Thanks!

 ![image](https://canada1.discourse-cdn.com/flex009/uploads/comfyui1/original/1X/a8ba89ecdba6b81b91b9011c76cefac2f32bee4e.jpeg)