# Cannot tag m4b file

**URL:** https://community.mp3tag.de/t/cannot-tag-m4b-file/58507
**Category:** Support
**Created:** [September 18, 2022, 4:59pm UTC](https://community.mp3tag.de/t/cannot-tag-m4b-file/58507 "2022-09-18T16:59:12Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [September 18, 2022, 5:05pm UTC](https://community.mp3tag.de/t/cannot-tag-m4b-file/58507/2 "2022-09-18T17:05:06Z")

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See here:

> [@How to check files for errors?](https://community.mp3tag.de/t/how-to-check-files-for-errors/44633):
>
> It’s required and often helps to reduce support cycles to check files for errors before filing a bug report. Symptoms of erroneous files are often missing or wrong bitrate or length audible blips or skips tags seem to be sticky and cannot be removed There are some really good tools to check the files for errors, namely MP3 Diags — identifies many different issues in MP3 files Website: [http://mp3diags.sourceforge.net](http://mp3diags.sourceforge.net) Download: [MP3 Diags - Getting MP3 Diags](http://mp3diags.sourceforge.net/010_getting_the_program.html#binWindows) If the font size in MP3 Diags is …

or here:

> [@Tags not saved in mp4 files](https://community.mp3tag.de/t/tags-not-saved-in-mp4-files/14151):
>
> I'm trying to add titles, album, artist tags to a set of mp4 files. No error shows up when I tell it to save the tags, but the files do not have any tags in them. As a result this software seems totally useless. What am I doing wrong? I've tried several versions of mp3tag including 2.53 with no change in behavior. I don't see any way to make it work and there is no documentation pointing me to what I'm doing wrong.

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