# Failed to sync to Engine DJ
**URL:** https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906
**Category:** Advice Needed
**Created:** [December 5, 2023, 9:16am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906 "2023-12-05T09:16:26Z")
**Posts on this page:** 20
**Page:** 2
### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 15, 2023, 1:23pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/21 "2023-12-15T13:23:02Z")
> **[m stu.db](https://drive.google.com/file/d/1dgMedKKt4CJm1LauFNAworqZGTsBRKna/view?usp=sharing)**
>
> Google Drive file.
Try using this one instead of your m.db
I didn’t really fix anything, just cleaned it. Not sure if it will help… The database didn’t report any errors
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 17, 2023, 3:30pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/22 "2023-12-17T15:30:17Z")
No Joy I’m afriad
I am going to try killing off my lexicon database and rebuilding, it only does it exporting to Engine no Issues with Serato or Rekordbox for me.
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 17, 2023, 5:05pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/23 "2023-12-17T17:05:26Z")
So, deleted my collection in Lexicon and reimported from Serato, ran an export with album art to usb and still failed with corrupt database message, even though a clean usb and surely Lexicon is creating the db at this point? very odd
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 17, 2023, 6:42pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/24 "2023-12-17T18:42:24Z")
The corruption is in the Engine db, not Lexicon. Try deleting that one
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 17, 2023, 7:43pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/25 "2023-12-17T19:43:10Z")
but isn’t this is a database that lexicon is creating, the usb is blank and its a fresh export.
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 17, 2023, 10:48pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/26 "2023-12-17T22:48:00Z")
Hm okay, maybe a faulty USB?
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 18, 2023, 7:36am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/27 "2023-12-18T07:36:43Z")
I bought a brand new 2TB SandDisk SSD because I thought the same but it does it on that too, I am on Sonoma if that makes a difference.
I am confused as to how it is corrupting during creation, only with artwork.
Never had this before, and only started a week or 2 ago, I have just re-ran find new artwork on anything over the last 3 months and will re-run the export to see if it makes any difference
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 18, 2023, 8:18am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/28 "2023-12-18T08:18:49Z")
Nope still fails, always seems to get to around 10-12% before it fails
I am going to build a collection in Engine DJ without Lexicon tonight and see if I get th same result
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 18, 2023, 8:54am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/29 "2023-12-18T08:54:44Z")
Not sure why it fails… maybe some weird album art causing problems, just a wild guess. I already reduced how many album art data it sends to Engine at a time so not sure further reducing that would change anything.
The most common reasons why a database can be corrupted is when another process writes at the same time or if you have a power failure. There’s a bunch of other ways to do it but they are all very uncommon.
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 18, 2023, 9:04am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/30 "2023-12-18T09:04:03Z")
I wonder whether this is Sonoma related then, it’s unusable with any kind of artwork active.
The test will be if it work direct from Engine DJ without any Lexicon Database included
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 18, 2023, 2:53pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/31 "2023-12-18T14:53:30Z")
Ok, so it does only happen when Lexicon is involved, a fresh clean Engine DJ Database with tracks imported directly exports to usb fine, but when the database has been created by Lexicon it fails
UPDATE: The minute I wrote this it failed…more investigation required lol
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 18, 2023, 4:21pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/32 "2023-12-18T16:21:38Z")
When you delete the Engine database, do you also delete any related files? Like `m.db-shm` and `m.db-wal`?
Leaving those when deleting m.db can cause corruption too
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 19, 2023, 9:11am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/33 "2023-12-19T09:11:48Z")
I completely remove the whole folder.
I am just in the process of trying ATGR’s software to see if the error happens after a conversion using DCU etc.
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 19, 2023, 12:28pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/34 "2023-12-19T12:28:29Z")
I can’t fathom this at all, I have even removed Norton as I thought it may be trying to scan the db file while it is in use but no, still fails with that removed
If I upload the log from this last failure, would you be able to see if a particular file is causing an issue? I don’t understand how it would as I have triple checked everything
UPDATE: I have read the logs and testing the track that was last to be processed being removed
Update 2: Still fails and with a different track unrelated to the previous one
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 19, 2023, 7:19pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/35 "2023-12-19T19:19:20Z")
So I have moved my collection to another Mac, my Macbook Pro and I get the same response, I am going to remove ALL artwork and try again
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 20, 2023, 1:53pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/36 "2023-12-20T13:53:31Z")
Something really weird is going on, looking at your logs. I see the SQL errors on the Engine database, but also on the Lexicon database. Just normal queries that should have no reason for failing. I have no way to explain why it would fail on 2 separate databases. My first thought is a software issue (virus scanner or maybe even a virus) or some bad hardware (hard drive or memory perhaps).
But if you tried it on a different Mac, the above seems very unlikely… I’d try syncing in smaller batches and see if there is a particular batch that fails. It could be one offending track, or multiple to make the search harder 😕
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 21, 2023, 10:49am UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/37 "2023-12-21T10:49:33Z")
I am going to use my xmas break to get to the bottom of this, I am going to run up my old windows machine and try the same collection too.
I have seen reports of Sonoma playing hell with ExFat drives in some scenarios, this is why I tried another mac.
I have gone through all the same thoughts as you re hardware, hence buying a new SSD and also trying on a different Mac, there can’t be a virus on both etc and the Norton is only on 1 machine.
I am going to also go through my collection again to try and locate any suspect tracks, but it only happens when artwork is involved too, all very strange
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 21, 2023, 12:00pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/38 "2023-12-21T12:00:43Z")
I can make a special Lexicon build that sends tracks to the database one by one, maybe that will tell us something. If it always errors on the same track, that would be good to know.
Still doesn’t explain why I saw errors in the Lexicon database as well though
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### Author:  [@StuR](https://discuss.lexicondj.com/u/StuR)
#### Post date: [December 21, 2023, 12:45pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/39 "2023-12-21T12:45:08Z")
That would be really helpfull, I could be here a while with 85000+ tracks, yes I need to slim down my collection too lol
This may be a long shot and feel free to tell me to go away, is there a way to allow an export to NTFS or AFPS, just to rule out the ExFat issue?
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### Author:  [@Christiaan](https://discuss.lexicondj.com/u/Christiaan)
#### Post date: [December 21, 2023, 2:05pm UTC](https://discuss.lexicondj.com/t/failed-to-sync-to-engine-dj/1906/40 "2023-12-21T14:05:54Z")
Sure, I’ll build a release that allows that. And does one track at a time (will be muuuch slower to sync though).
Are you using the beta release?
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