# Catalog Number with Traktor
**URL:** https://community.mp3tag.de/t/catalog-number-with-traktor/54363
**Category:** Mac
**Tags:** player
**Created:** [September 12, 2021, 4:22pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363 "2021-09-12T16:22:07Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Laurent](https://community.mp3tag.de/u/Laurent)
#### Post date: [September 12, 2021, 4:22pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363/1 "2021-09-12T16:22:07Z")
Hi !
I've got the same problem as you.
I want to edit the CATALOGNUMBER in MP3Tag and be able to see it on Traktor as CATALOG NO
i'm on a mac version of MP3 tag
i created a new field named CATALOGNUMBER, i may insert it the %catalogid% but i never see it on traktor.
I also see that when you edit the value in traktor, i can't see the result on mp3tag. When looking at extended tag, nothing match
Then how do you solve on your way ??
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### Author:  [@Laurent](https://community.mp3tag.de/u/Laurent)
#### Post date: [September 12, 2021, 5:15pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363/2 "2021-09-12T17:15:52Z")
hi again 🙂
i've found the solution ! It works now
i've created the field (and done the same for traktor LABEL)
i've done an action who force the field catalognumber & label with %catalogid% and %publisher% found on discogs
Thanks for all this it helps me to see how mp3tag works & will buy the mac licence, 😉
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### Author:  [@Laurent](https://community.mp3tag.de/u/Laurent)
#### Post date: [September 16, 2021, 8:59pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363/3 "2021-09-16T20:59:14Z")
Hi everybody,
Just some precision about all i've sad before.It works very well with m4a files, but seems not with mp3.
I'm working on some mp3 files & i can't edit the catalognumber for Traktor
Still investigating but for the moment, only m4a works
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### Author:  [@Laurent](https://community.mp3tag.de/u/Laurent)
#### Post date: [May 11, 2024, 4:26pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363/4 "2024-05-11T16:26:31Z")
Hi!
i'm working again on my collection & with Traktor.
I never found a solution to get the catalog No from Traktor visible on mp3tag. Can't find the field
it works well with m4a but not mp3
Any solution ?
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### Author:  [@Patch](https://community.mp3tag.de/u/Patch)
#### Post date: [May 17, 2024, 6:10pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363/5 "2024-05-17T18:10:29Z")
I'm sure Catalog No. is stored in the Traktor Collection.nml file...?
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [May 17, 2024, 6:15pm UTC](https://community.mp3tag.de/t/catalog-number-with-traktor/54363/6 "2024-05-17T18:15:57Z")
I think you got already a detailed answer in this thread:
> [@Traktor Catalog Number](https://community.mp3tag.de/t/traktor-catalog-number/44882/19):
>
> In my further tests neither for FLAC nor for MP3 files the CATALOGNUMBER was written back into the files as standard tag. For MP4 or M4A files, the CATALOGNUMBER was written as expected. I don't know why Native Instruments does not handle all the music formats the same way. Would be very helpful, if you could let us know what Native Instruments wrote in its answer.