# \[X\] Auto-numbering with leading zero fails

**URL:** https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064
**Category:** No Bugs
**Created:** [February 7, 2012, 6:24am UTC](https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064 "2012-02-07T06:24:38Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![hoodafukisalice](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/h/f17d59/32.png) [@hoodafukisalice](https://community.mp3tag.de/u/hoodafukisalice)
#### Post date: [February 7, 2012, 6:24am UTC](https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064/1 "2012-02-07T06:24:38Z")

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Hi Developers,

```
I just installed v2.49b. There's a problem with auto-number tagging.

```

## Here's how to reproduce

- Choose more than 10 files
- Select the Auto-number wizard (Ctrl+K)
- Check the "leading zeros for tracknumbers..." checkbox
- Apply and save the files
- Refresh and see that leading zeros are not applied for track numbers 1-9

Thanks

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### Author: ![DetlevD](https://community.mp3tag.de/user_avatar/community.mp3tag.de/detlevd/32/123_2.png) [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [February 7, 2012, 6:57am UTC](https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064/2 "2012-02-07T06:57:19Z")

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> [@Timbuctoo](#):
>
> ... I just installed v2.49b. There's a problem with auto-number tagging. ... leading zeros are not applied for track numbers 1-9 ...

On which type of media file you've noticed the possible misbehaviour?  
Which ID3 tag version is in usage and has been written?

DD.20120207.0857.CET

---

<div class="post-metadata">

### Author: ![hoodafukisalice](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/h/f17d59/32.png) [@hoodafukisalice](https://community.mp3tag.de/u/hoodafukisalice)
#### Post date: [February 7, 2012, 7:04pm UTC](https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064/3 "2012-02-07T19:04:24Z")

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> [@DetlevD](#):
>
> On which type of media file you've noticed the possible misbehaviour?  
> Which ID3 tag version is in usage and has been written?
> 
> DD.20120207.0857.CET

Hi DetlevD,

Here are the details:

```
Media Type: .m4a file
Tag Version written: MP4
Tag Version in Usage: Did not notice before writing the tag.

```

I have attached screenshots for the above. Also, I noticed that it seems like the track number is actually written with a leading '0'. However, when displaying the tag using Mp3Tag and foobar2000, only the digit number of the track is displayed (that is, 4 from the attached screenshot, and not 04).

Let me know if you need more details, I would be happy to help.

Warm Regards

![](https://community.mp3tag.de/uploads/default/original/2X/a/a79eadb3cc9aa198068ece4dbd0e3a49e4417176.jpg)

![](https://community.mp3tag.de/uploads/default/original/2X/b/b76ebf15cb10ccb27352a599a7a1380793f1e260.jpg)

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<div class="post-metadata">

### Author: ![dano](https://community.mp3tag.de/user_avatar/community.mp3tag.de/dano/32/6_2.png) [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [February 7, 2012, 9:05pm UTC](https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064/4 "2012-02-07T21:05:59Z")

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The mp4 tag format does not support leading zeroes.  
No bug.

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### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 28, 2018, 2:31pm UTC](https://community.mp3tag.de/t/x-auto-numbering-with-leading-zero-fails/13064/5 "2018-12-28T14:31:54Z")

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