# Combination of script commands
**URL:** https://community.mp3tag.de/t/combination-of-script-commands/1135
**Category:** Support
**Created:** [July 14, 2004, 7:38am UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135 "2004-07-14T07:38:47Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@mll](https://community.mp3tag.de/u/mll)
#### Post date: [July 14, 2004, 7:38am UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135/1 "2004-07-14T07:38:47Z")
Hi,
First, many thanks for Florian for making this great app free. And congratulations to you for the boost in usability, performance and power : I had tried MP3Tag some years ago, and chose at that time to turn to MP3 Tag Studio. I'm glad I recently gave MP3Tag a try again, it's now my primary music files tage editor ! 🙂 BTW, I guess the name should be changed : MP3Tag happens to work fine on my MPCs. 😉
Now for my question :
I'd like to apply script commands this kind :
```
$validate($replace("%track% - %title%", "/", "-"), "_")
```
or even better :
```
$validate($replace("%track%", "/", "-") & " - %title%", "_")
```
unfortunately, I get this reply
> [@](#):
>
> [unrecognized variable or operator: $]
So, can we use multiple script commands ? Is there a text concatenation operator (didn't find anything about this in the help & -english- forum).
TIA
MLL
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [July 14, 2004, 4:45pm UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135/2 "2004-07-14T16:45:29Z")
I'm glad that you like Mp3tag 🙂 Thanks for your feedback!
You can use $validate(replace("%track% - %title%", "/", "-"), "\_") to use both functions.
Best regards,
~ Florian
---
### Author:  [@mll](https://community.mp3tag.de/u/mll)
#### Post date: [July 14, 2004, 5:58pm UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135/3 "2004-07-14T17:58:49Z")
Thanks for the quick reply. But what if I want to substitute "/" for "-" only to the track field, and not the rest, while validating the whole ?
Something like this :
```
$validate(replace("%track%", "/", "-") & " - %title%", "_")
```
gives me a [syntax error: &], my assumption of "&" being the text concatenation operator being wrong.
TIA
MLL
---
### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [July 14, 2004, 6:09pm UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135/4 "2004-07-14T18:09:16Z")
I'm sorry, but there's no concatenation operator at the moment. I think you can use $replace("%track%", "/", "-") - $validate("%title%", "\_")
because it's very unlikely, that there are other special characters in your TRACK fields which needs validating.
Best regards,
~ Florian
---
### Author:  [@mll](https://community.mp3tag.de/u/mll)
#### Post date: [July 14, 2004, 7:17pm UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135/5 "2004-07-14T19:17:11Z")
Yes, that'll do. Thanks ! 🙂
MLL
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:19pm UTC](https://community.mp3tag.de/t/combination-of-script-commands/1135/6 "2026-02-09T12:19:14Z")