What error 199 means
Error 199 is not a refusal from your music service, and it is not a limit on your account. It appears when the connection between your browser and Soundiiz is interrupted while an operation is running: the page never gets the answer it was waiting for, so it shows this code instead of a result.
Anything that cuts that link can cause it, and none of it is unusual: a Wi-Fi drop, a phone or laptop going to sleep, a tab closed or reloaded, a VPN reconnecting, a company or campus network filtering long requests. The longer the operation runs, the more chances it has to be interrupted, which is why the same playlist can go through one day and stop the next.
Your transfer may still be running
Losing the page does not stop the work. Once a transfer has started, it keeps going on our side and it is saved when it ends, so it can land in your account minutes after the error appeared on screen. The error screen tells you that the connection was lost and that the operation may still be running, and it offers a Recent transfers button that opens the list where a finished transfer shows up.
This is the part worth reading twice: starting again straight away is what creates duplicates. People who relaunch immediately often end up with the same playlist twice, or with two half-filled copies sitting next to each other on the destination service.
What to do when you see it
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Give it a few minutes
A large transfer that was already under way needs time to finish on its own, and how long a transfer takes depends mostly on its size. Nothing you do in the browser speeds it up or stops it. -
Open Recent transfers
Use the button on the error screen, or the Activity section of the app. A transfer that completed appears there with the number of tracks that arrived. If you find it listed but stuck at 0% with a Pending status, it is queued rather than lost. -
Check the destination playlist
Open the service you were copying to and refresh it. A playlist created a few minutes ago is often already there, complete or nearly complete. -
Only then, run it again
If nothing arrived, start the transfer again on a stable connection, and leave the tab open and awake until it ends.
Very long playlists and big files
The bigger the list, the longer the browser has to hold the line, and the more likely something interrupts it. That is why error 199 shows up mostly on playlists of several thousand tracks, on merges of two large lists, and on file imports with thousands of rows.
Frequently Asked Questions
Does error 199 mean my transfer failed?
Not on its own. It means the page lost contact before it could show you the result, which is a different thing from the transfer being rejected. Check Recent transfers and the destination playlist first: in many cases the tracks are already there.
I ran it again and now I have two playlists. What now?
Keep the most complete one and delete the other from your music service, where it was created. Soundiiz does not merge the two for you, and deleting the extra copy on the destination service has no effect on your original playlist.
Does it come from Soundiiz or from my music service?
Neither, in most cases. This code is written by the page in your browser when it stops receiving an answer, so it describes the link between you and Soundiiz. A refusal from a music service looks different: it comes with its own message explaining what was denied.
It happens every time on the same playlist. What can I do?
Try it once on a wired or stable connection, with the tab left open and the screen awake. If it still stops at the same point, send us the playlist link and the destination service: a list that always breaks in the same place usually has a specific track or a source limit behind it, and we can look at it directly.