# File xxx couldn't be open to write

**URL:** https://community.mp3tag.de/t/file-xxx-couldnt-be-open-to-write/41327
**Category:** Support
**Created:** [April 4, 2018, 2:09pm UTC](https://community.mp3tag.de/t/file-xxx-couldnt-be-open-to-write/41327 "2018-04-04T14:09:14Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![Zerow](https://community.mp3tag.de/user_avatar/community.mp3tag.de/zerow/32/11379_2.png) [@Zerow](https://community.mp3tag.de/u/Zerow)
#### Post date: [April 8, 2018, 10:44am UTC](https://community.mp3tag.de/t/file-xxx-couldnt-be-open-to-write/41327/5 "2018-04-08T10:44:48Z")

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[I am little late, but...]

> [@ohrenkino](#):
>
> Apparently M4A files are troublesome. See here:  
> [...]  
> and here:  
> [...]  
> and here:  
> [...]

And here:

> [@APE files problem](https://community.mp3tag.de/t/ape-files-problem/17672/12):
>
> Well Mr. zerow, I've tried out this M4A format and it seems to behave in Mp3tag similar as APE- you have to stop the file before changing a tag value in it. Which of course will make you loose a ton of time and completely disrupt my workflow; I mean your workflow But I've also tried out the WMA format in 9.2 lossless version. And it seems to works exatly [in terms of playing and metadata retaining] the same way as MP3 and FLAC. And also making an "encoding test loop" FLAC \> WAV \> WMA \> WAV res…

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