Soundiiz Error 104: Can't Delete, Rename, or Remove Duplicates on Some Platforms

What this message means

Soundiiz can only do what a music service opens up to outside apps. Creating a playlist, adding a favorite, renaming, deleting: every action goes through the door that service leaves open. When you see Feature not available for a platform, the action you asked for is not offered by that service at all.

Your Soundiiz plan has nothing to do with it, and neither does your connection: retrying, reconnecting or upgrading with us returns the same message. The one thing that can change the answer is the subscription you hold with the music service itself, which is the fourth case below.

Three situations trigger it

1. The service cannot receive that type of content
   Some services only work as a source. Musi hands its playlists over to Soundiiz, and nothing can ever be written back to it. Others accept one type and refuse the next: YouTube takes everything except albums.
2. The service receives content, but one action stays closed
   Apple Music accepts brand new playlists, and its API still offers no way to rename or delete them afterwards. This is why creating works and cleaning up does not.
3. The action exists, but not on a playlist that size
   Removing duplicates on YouTube and YouTube Music works up to 2,000 tracks. Past that, the service makes us read and delete one by one for hours, with a real chance of losing the playlist along the way, so we stop rather than risk it.
4. Your account with the service is on its free tier
   Amazon Music opens playlists and favorites to outside apps for its paying listeners only. On a free account, creating a playlist or adding a favorite comes back with this message, and a paid subscription with them lifts it.

Actions most often refused

A few examples, with one service each. This is not the full list, and it moves as services update their APIs.

Check a service before you start

The compatibility page lists every service we support, with one line each and one column per type of content: playlists, albums, artists, tracks. Each cell says whether we can read that content, write it too, or reach it at all.

Read the destination line before a transfer, not the source one. A service that gives you everything can still be unable to take anything back.

What you can do instead

1. Try another type of content
   A service can refuse one type and accept the next. Read the four columns of its line on the compatibility page, not just the one you tried. On YouTube, three of the four are wide open.
2. Move in the other direction
   A service that receives nothing can still give everything. Musi is a dead end as a destination and perfectly good as a source: your music can leave it for anywhere else.
3. Switch a sync from Replace tracks to Add tracks
   Replace tracks empties the destination playlist before refilling it, so it needs a service that lets us delete. Add tracks only ever adds, and it goes through where the other one stops. This is the most common way to meet this message on a synchronization.
4. Do the closed step by hand
   Renaming or deleting a playlist takes a few seconds in the service's own app, even when its API refuses it to us. Soundiiz handles the part that would take you hours.

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