# Numbering Wizard sometimes fails to add leading zero
**URL:** https://community.mp3tag.de/t/numbering-wizard-sometimes-fails-to-add-leading-zero/12104
**Category:** Support
**Created:** [June 6, 2011, 4:10pm UTC](https://community.mp3tag.de/t/numbering-wizard-sometimes-fails-to-add-leading-zero/12104 "2011-06-06T16:10:27Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@acmeseed](https://community.mp3tag.de/u/acmeseed)
#### Post date: [June 6, 2011, 4:10pm UTC](https://community.mp3tag.de/t/numbering-wizard-sometimes-fails-to-add-leading-zero/12104/1 "2011-06-06T16:10:27Z")
Hello,
I use the auto-numbering wizard and I have it setup to add a leading zero when needed. I have noticed that in some cases it fails to add the zero, it happens rarely and I can't see anything different about the files.
I will greatly appreciate your response and I apologize if this has been covered before; I searched for numbering, wizard, etc. and could not find any reference to this.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [June 6, 2011, 4:20pm UTC](https://community.mp3tag.de/t/numbering-wizard-sometimes-fails-to-add-leading-zero/12104/2 "2011-06-06T16:20:22Z")
> [@Mike C.](#):
>
> .. leading zero ...
Leading zeros should only be applied if more than 9 files in a sequence have to be numbered.
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [June 6, 2011, 4:26pm UTC](https://community.mp3tag.de/t/numbering-wizard-sometimes-fails-to-add-leading-zero/12104/3 "2011-06-06T16:26:56Z")
> [@Mike C.](#):
>
> ... I have noticed that in some cases it fails to add the zero, it happens rarely and I can't see anything different about the files. ...
It can depend on the file type.
See also ...
[No leading zeros in MP4 track# field](https://community.mp3tag.de/t/11097/2)
DD.20110606.2037.CEST
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:23pm UTC](https://community.mp3tag.de/t/numbering-wizard-sometimes-fails-to-add-leading-zero/12104/4 "2026-02-09T12:23:09Z")