Hi, I’ve tried everything. Reinstalled Traktor 3 and 4; checked the .nml file is in the proper place, nothing.
It used to work fine, but now when I open Traktor the only playlists visible are those within folders within Music. None of the Lexicon ones.
In Lexicon, all the playlists are visible.
Help! I can’t seem to find a workaround either.
It might be using the wrong NML file, check in Documents/Native Instruments/Traktor which collection.nml file is getting edited by Lexicon and make sure that version is the same as the version of Traktor you use.
It might help to use Cleanup in Lexicon (Help menu at the top) and put it on Interface which will reset a custom NML path if you set that.
ah great, I used the Cleanup> Interface and I’m just waiting for Traktor pro3 to finish analysing (why does it even need to do that again??) before closing it and attempting a sync. I’ll get back to you if I’m still having trouble, and thank you for the quick reply on a weekend!
right so when I reopened T3, it was like it had just been reinstalled. No tracks in library. I opened T4 instead, and the playlists are now there, but only 700ish tracks from my library of 8k+ and also, none of the ratings / genres / edits have been synced. I really wish I knew what I was doing wrong 
maybe uninstall traktor 3 and any other traktor version so you only run the latest traktor 4. Then do a full sync and it should send it all there..
I can check your Lexicon logs if that doesnt work
yeah it’s still not working
Can you upload your logs? From the Help menu at the top
done, I’ve done backups to the cloud too
It’s finding your Traktor file in OneDrive: OneDrive\Documents\Native Instruments\Traktor 4.4.1\collection.nml
Can you confirm that is the right or wrong version?
It finds it there because the setting in Traktor is for root dir is changed to onedrive so you might want to change it to something else, like regular Documents\Native Instruments\Traktor 4.4.1\collection.nml outside of onedrive
So I copied the traktor file to C: drive (where my OneDrive backup doesn’t cover) and changed the root dir in Traktor. Looks like the tracks now show up, but not in the playlists and not sorted / tagged / cue points assigned etc. I’m going to completely uninstall T4 and start again, clear all NI files / directories / folders completely.
Phew, so after a complete uninstall of every traktor / NI; and a fresh reinstall of NI access and TP4, I tentatively synced one playlist, and THANK THE GODS it seems to have worked fine. Something somewhere wasn’t right, it did co-incide with me starting to use OneDrive as my cloud storage rather than Dropbox, so something odd happened there, but I’m really pleased it seems to be back on track now.
Thank you so much for your rapid and clear responses! Much appreciated.
I do have one more question, is there a solution for separating the album from the title and artist when the metadata has lumped it all in as one? Currently it’s able to separate the artist with the smart cleanup function, but this still leaves me with nonsense like this:
Ninja Columbo 2 ‘Stand up Step aside’ - 02 Dolphin - Crowdrocka EP
…which ends up having ‘Ninja Columbo 2 ‘Stand up Step aside’ - Crowdrocka EP’ still in the Title field after the smart fix extraction. It would be amazing if there was a magic fix that I don’t know about to sort this?
Kay
Glad you got it working 
You can try the Split Field recipe. It will probably work for that but only if the titles all have the same structure.