# Custom Action Help
**URL:** https://community.mp3tag.de/t/custom-action-help/2446
**Category:** Support
**Created:** [November 1, 2005, 12:20am UTC](https://community.mp3tag.de/t/custom-action-help/2446 "2005-11-01T00:20:42Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@fcastro](https://community.mp3tag.de/u/fcastro)
#### Post date: [November 1, 2005, 12:20am UTC](https://community.mp3tag.de/t/custom-action-help/2446/1 "2005-11-01T00:20:42Z")
Hi everyone having a problem figuring out how to do this. I have a file that is named:
14.Ol Dirty Bastard - Lyrical Virus - MVP.mp3
I want to create an action that will remove " - MVP"
So the end result would look like this:
14.Ol Dirty Bastard - Lyrical Virus.mp3
But I can't make it work. I went into actions and made this action:
Replace "\_FILENAME": "- MVP.mp3" -\> ".mp3"
but it isn't working...what am I doing incorrectly?
thanks in advance 🙂
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [November 1, 2005, 6:55am UTC](https://community.mp3tag.de/t/custom-action-help/2446/2 "2005-11-01T06:55:17Z")
You can't use the file extension at the Replace action type. Just replace "- MVP" by nothing. If you really need to replace the file extension, you can use the action type Replace with regular expression.
Best regards,
~ Florian
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### Author:  [@fcastro](https://community.mp3tag.de/u/fcastro)
#### Post date: [November 15, 2005, 1:45am UTC](https://community.mp3tag.de/t/custom-action-help/2446/3 "2005-11-15T01:45:21Z")
Florian thanks that fixed it.
By far the best and most feature packed filenamer out there! 😆
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:19pm UTC](https://community.mp3tag.de/t/custom-action-help/2446/4 "2026-02-09T12:19:30Z")