[quote=IanRTaylorUK post_id=528768 time=1754831899 user_id=105749]
Hi, sent a private e-mail with a link that may help explain by using a Portable MMW4 installation with specific data!
[/quote]

Hi, thanks. Although I think I already figured it out. Your case is a bit different from mine because you have artwork in the folder and I only use tags, but it's basically the same issue.
The only problem is that when MM rescans the files, it doesn't delete the lines in Covers for tracks that had artwork but now it's missing. It's a bug and there's not much I can do about it, except installing a portable version now and then and scanning the library fresh. Not something I look forward to, as each new scan requires several hours.

Anyway, thanks for the help. I did figure it out eventually, although it didn't help me much with what I needed.

Hi, sent a private e-mail with a link that may help explain by using a Portable MMW4 installation with specific data!

Ok. From what I understand, given everything I've tried and resources linked here, MM4 creates a record in the Covers table but it doesn't store the blob itself.
So what it must be doing is that if a track has a Covers entry it will look up the artwork in the file tags.

If that is the case, then if, for some reason, the artwork is removed from the files without MM knowing, it will keep an innacurate record from then on.
Which also would mean that the only way of finding files in these conditions would be through some external tools to find files without this tag. Or by using a portable version to scan everything from the start.

What I don't get is why rescanning the library doesn't update these files. This seems to be the problem, I think.

[quote=DJSamhein post_id=528602 time=1753969590 user_id=29690]
I just can't figure out how MM4 stores the artwork there.
[/quote]
https://www.mediamonkey.com/wiki/WebHelp:About_Track_Properties

https://www.mediamonkey.com/wiki/WebHelp:Album_Art

After some more debugging the issue, I've figured out that in the portable DB the songs don't have a corresponding Covers entry.

Which means that I only need to figure out how MM loads the blob from this table (it's likely pointing to a non-existent or empty blob). But this info doesn't appear to be in any of the tables. So I'm guessing they store it somewhere else? Maybe an external file or something? Though I can't really find one.

At this point I've pretty much pinpointed that the issue is somewhere in the MM.db file. I just can't figure out how MM4 stores the artwork there.
It would be helpful if someone from their team would chime in and let me know where to look.

Sometimes, I have found it useful to remove files from the database (but NOT from the hard drive), then check they are not present in the library. You might even want to do a Database Backup / Maintainence routine...

A fresh scan will add them BUT any information in the database NOT stored in tags would be lost!

It might be worth considering this as an approach / test.

Seems like you are making progress.

When I did that, the "Unknown Artwork" was now empty. So it really is something in the MM.db.
I then restored the portable DB, re-scanned the library and now the "Unknown Artwork" node only shows the Estradasphere album as missing, which is correct because I fixed the other ones last night on the "proper" MM.

I left that album without it on purpose so I could identify what the issue is and how I can search for it in the future.
So it definitely is something in the MM.db file that is causing MM to think it has artwork when it doesn't. But I can't really figure out where it gets that info from with MM4.

So if you were to take the MM.DB from your original database and put a copy in the location of the portable database then run the portable, what might this tell you?

Perhaps take a backup of the portable database MM.DB first!

As I am sure you are aware, some user data only exists in the MM.DB.

As a followup: I installed a portable version and I scanned my entire database (which took a really long time). This version does show the files missing the artwork.

So I'm guessing there's something wrong with the DB or with however MM4 is caching this.

I don't have a PictureDataHash column. That is for MM5 and I'm using MM4.
I'm guessing MM4 stores that data somewhere else, but I can't really figure out where (much like the Album date).

This means that each track does have a corresponding entry on the Covers, but for some reason some of them won't have the cover and MM4 doesn't realize it.

https://octoberclub-my.sharepoint.com/:x:/g/personal/ian_octoberclub_onmicrosoft_com/Eejy77K3yC9ElQoKTsVi92IBrBsOVepf7UbAVRiDq3X3yA?e=vScKLL

This is my "Covers" table (using MMW5) with about 99% artwork OK in MMW5 / MMW4 and MMA.

select a.Artist, al.Album, s.SongTitle,c.*,d.*
from Artists a
inner join ArtistsAlbums aa on aa.IDArtist=a.ID
inner join Albums al on aa.IDAlbum=al.ID
inner join songs s on s.IDAlbum=al.ID
inner join Covers c on c.IDSong=s.ID
left join DeviceTracks d on d.IDTrack=s.ID
left join Devices de on de.ID=d.IDDevice
where a.Artist like 'Estradasphere'
order by a.Artist,al.Album,s.TrackNumber

Artist	Album	SongTitle	ID	IDSong	CoverOrder	CoverPath	CoverStorage	CoverDescription	CoverType	PictureType	ID	IDDevice	IDTrack	DevicePath	Rating	PlayCount	UploadTime	Status	Converted	PreModified	Bitrate	SampleRate	Channels	IsVBR	ACSettHash
Estradasphere	Quadropus	Mekapses Yitonisa	162387	32000	0		0		3	image/jpeg															
Estradasphere	Quadropus	Dubway	162388	32001	0		0		3	image/jpeg															
Estradasphere	Quadropus	King Krab Battle	162389	32002	0		0		3	image/jpeg															
Estradasphere	Quadropus	Speck	162390	32003	0		0		3	image/jpeg															
Estradasphere	Quadropus	Hardball	162391	32004	0		0		3	image/jpeg															
Estradasphere	Quadropus	A Car Ride In Idealistic Ethiopia (Part 1)	162392	32005	0		0		3	image/jpeg															
Estradasphere	Quadropus	Crystal Blue	162393	32006	0		0		3	image/jpeg															
Estradasphere	Quadropus	Jungle Warfare	162394	32007	0		0		3	image/jpeg															
Estradasphere	Quadropus	Bodyslam	162395	32008	0		0		3	image/jpeg	3190140	3	32008	iPod_Control\Music\F08\Estr.mp3	100	6	43735.8647695833	1	0	0	192000	44100		0	
Estradasphere	Quadropus	At Least We'd Have Today	162396	32009	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Buck Fever	214653	31984	0		0		3	image/jpeg															
Estradasphere	Buck Fever	The Dapper Bandits	214654	31985	0		0		3	image/jpeg															
Estradasphere	Buck Fever	The Silent Elk Of Yesterday	214655	31986	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Crag Lake	214656	31987	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Meteorite Showers	214657	31988	0		0		3	image/jpeg															
Estradasphere	Buck Fever	The Bounty Hunter	214658	31989	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Super Buck II	214659	31990	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Millennium Child	214660	31991	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Trampoline Klan	214661	31992	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Burnt Corpse	214662	31993	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Rise N' Shine (Epic Doobie Nightmare #1)	214663	31994	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Bride Of The Buck	214664	31995	0		0		3	image/jpeg															
Estradasphere	Buck Fever	A Very Intense Battle	214665	31996	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Green Hill	214666	31997	0		0		3	image/jpeg															
Estradasphere	Buck Fever	Feed Your Mama's Meter (Remix 2001)	214667	31998	0		0		3	image/jpeg															
Estradasphere	Buck Fever	What Deers May Come	214668	31999	0		0		3	image/jpeg															
Estradasphere	It's Understood	Hunger Strike	293353	31972	0		0		3	image/jpeg	3190141	3	31972	iPod_Control\Music\F22\Estr.mp3	100	3	43735.8647790394	1	0	0	128000	44100		0	
Estradasphere	It's Understood	Cloud Land	293350	31973	0		0		3	image/jpeg															
Estradasphere	It's Understood	The Transformation	293360	31974	0		0		3	image/jpeg															
Estradasphere	It's Understood	Danse Of Tosho And Slavi / Randy's Desert Adventure	293351	31975	0		0		3	image/jpeg															
Estradasphere	It's Understood	The Trials And Tribulations Of Parking On Your Front Lawn	293361	31976	0		0		3	image/jpeg	3190143	3	31976	iPod_Control\Music\F26\Estr.mp3	100	5	43735.8647860301	1	0	0	128000	44100		0	
Estradasphere	It's Understood	The Princes Of Xibalba: The Princes	293358	31977	0		0		3	image/jpeg															
Estradasphere	It's Understood	The Princes Of Xibalba: Los Días Sin Días	293357	31978	0		0		3	image/jpeg															
Estradasphere	It's Understood	The Princes Of Xibalba: XQuiQ	293359	31979	0		0		3	image/jpeg															
Estradasphere	It's Understood	The Princes Of Xibalba: Hunnahpu And Xbalanque	293356	31980	0		0		3	image/jpeg															
Estradasphere	It's Understood	Spreading The Disease	293355	31981	0		0		3	image/jpeg															
Estradasphere	It's Understood	Planet Sparkle / Court Yard Battle 1	293354	31982	0		0		3	image/jpeg															
Estradasphere	It's Understood	D♭ Hell	293352	31983	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Dissatisfactual Contraband	200495	94868	0		0		3	image/jpeg	3591161	104	94868	Music\Estradasphere\Passion For Life\01 Estradasphere - Dissatisfactual Contraband.mp3	-1	3	45857.5920181482	1	0	0	246512	44100		1	
Estradasphere	Passion For Life	Feed Your Mama's Meter	200496	94869	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Planet Sparkle	200497	94870	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Bat Cave	200498	94871	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Hora Bucharestu Vs. Narodno Kolo (Gypsy Medley)	200499	94872	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Tugboat	200500	94873	0		0		3	image/jpeg															
Estradasphere	Passion For Life	The Jailing Of Whoolilicious!	200501	94874	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Kiss Tomorrow Goodbye / The Red Chowder Trenchcoat Conspiracy	200502	94875	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Graze-A-Holic	200503	94876	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Danse Of Tosho & Slavi / Randy's Desert Adventure	200504	94877	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Elderly Normal Samurai Tortoises	200505	94878	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Boss III	200506	94879	0		0		3	image/jpeg															
Estradasphere	Passion For Life	D-Flat Hell	200507	94880	0		0		3	image/jpeg															
Estradasphere	Passion For Life	Body Slam (Lounge Version)	200508	94881	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Title	220887	32010	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Palace Of Mirrors	220878	32011	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	A Corporate Merger	220875	32012	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	The Terrible Beautypower Of Meow	220884	32013	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Colossal Risk	220876	32014	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	The Unfolding Pause On The Threshold	220885	32015	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Smuggled Mutation	220881	32016	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Six Hands	220880	32017	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	The Debutante	220882	32018	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Flower Garden Of An Evil Man	220877	32019	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Those Who Know...	220886	32020	0		0		3	image/jpeg															
Estradasphere	Palace Of Mirrors	Palace Of Mirrors (Reprise)	220879	32021	0		0		3	image/jpeg	3190142	3	32021	iPod_Control\Music\F21\Estr.mp3	-1	0	43735.8647836806	1	0	0	192000	44100		0	
Estradasphere	Palace Of Mirrors	The Return	220883	32022	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Title	279018	94905	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	4 Hands	279030	94895	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	The Pegasus Vault	279019	94906	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	American Tough	279050	94896	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	The Return (Unplugged)	279020	94907	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	A Van For A Mystery	279049	94897	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Rendezvous	279021	94908	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Star Slyderz (Theme)	279053	94898	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Some Semblance	279022	94909	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Circuit Malfunction	279048	94899	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Alterna-Meow Intro (A=432 hZ)	279040	94910	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Smuggled Mutation (Cimbalom Mix)	279052	94900	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Neither Hide Nor Hair	279024	94911	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	The Return (Live)	279036	94901	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Report To Deck	279025	94912	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Ems (1998)	279051	94902	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Flower Garden (Midi Demo)	279038	94903	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Faceoff: Advocate Vs. Accuser	279041	94913	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Merry X-Mas Blobby	279039	94904	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Judgement Tunnel	279042	94914	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	Unicorns And Rainbows (Single Version)	279043	94915	0		0		3	image/jpeg															
Estradasphere	The Pegasus Vault	The Pegasus Vault (Reprise)	279044	94916	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	The Silent Elk Of Yesterday	233714	94824	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Crag Lake	233701	94825	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Millennium Child (Live)	233706	94826	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	The Dapper Bandits	233711	94827	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	The Ventriloquist Choir	233715	94828	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Mikapses Yitonisa	233705	94829	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Burnt Corpse	233700	94830	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Rise 'N Shine (Edn#1)	233707	94831	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Disco Time	233702	94832	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	A Tune By F. F. C.	233698	94833	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	The Princes Of Xibalba	233713	94834	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	The Penguin	233712	94835	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Techno In The Style Of Burning Man	233710	94836	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Some Turkish Song	233709	94837	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Aunt Nellies Love Gravy	233699	94838	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Medley #3	233704	94839	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Some Irish Song	233708	94840	0		0		3	image/jpeg															
Estradasphere	The Silent Elk Of Yesterday	Hungerstrike (Ending)	233703	94841	0		0		3	image/jpeg															

I couldn't really get to a conclusion. I installed it and ran the query:
[code]select a.Artist, al.Album, s.SongTitle,c.*,d.*
from Artists a
inner join ArtistsAlbums aa on aa.IDArtist=a.ID
inner join Albums al on aa.IDAlbum=al.ID
inner join songs s on s.IDAlbum=al.ID
inner join Covers c on c.IDSong=s.ID
left join DeviceTracks d on d.IDTrack=s.ID
left join Devices de on de.ID=d.IDDevice
where a.Artist like 'Estradasphere'
order by a.Artist,al.Album,s.TrackNumber[/code]
It returned this information (doesn't copy properly with spacings, so might be hard to figure out what is what):
[code]Artist Album SongTitle ID IDSong CoverOrder CoverPath CoverStorage CoverDescription CoverType PictureType ID IDDevice IDTrack DevicePath Rating PlayCount UploadTime Status Converted PreModified Bitrate SampleRate Channels IsVBR ACSettHash
Estradasphere Quadropus Mekapses Yitonisa 162387 32000 0 0 3 image/jpeg
Estradasphere Quadropus Dubway 162388 32001 0 0 3 image/jpeg
Estradasphere Quadropus King Krab Battle 162389 32002 0 0 3 image/jpeg
Estradasphere Quadropus Speck 162390 32003 0 0 3 image/jpeg
Estradasphere Quadropus Hardball 162391 32004 0 0 3 image/jpeg
Estradasphere Quadropus A Car Ride In Idealistic Ethiopia (Part 1) 162392 32005 0 0 3 image/jpeg
Estradasphere Quadropus Crystal Blue 162393 32006 0 0 3 image/jpeg
Estradasphere Quadropus Jungle Warfare 162394 32007 0 0 3 image/jpeg
Estradasphere Quadropus Bodyslam 162395 32008 0 0 3 image/jpeg 3190140 3 32008 iPod_Control\Music\F08\Estr.mp3 100 6 43735.8647695833 1 0 0 192000 44100 0
Estradasphere Quadropus At Least We'd Have Today 162396 32009 0 0 3 image/jpeg
Estradasphere Buck Fever Buck Fever 214653 31984 0 0 3 image/jpeg
Estradasphere Buck Fever The Dapper Bandits 214654 31985 0 0 3 image/jpeg
Estradasphere Buck Fever The Silent Elk Of Yesterday 214655 31986 0 0 3 image/jpeg
Estradasphere Buck Fever Crag Lake 214656 31987 0 0 3 image/jpeg
Estradasphere Buck Fever Meteorite Showers 214657 31988 0 0 3 image/jpeg
Estradasphere Buck Fever The Bounty Hunter 214658 31989 0 0 3 image/jpeg
Estradasphere Buck Fever Super Buck II 214659 31990 0 0 3 image/jpeg
Estradasphere Buck Fever Millennium Child 214660 31991 0 0 3 image/jpeg
Estradasphere Buck Fever Trampoline Klan 214661 31992 0 0 3 image/jpeg
Estradasphere Buck Fever Burnt Corpse 214662 31993 0 0 3 image/jpeg
Estradasphere Buck Fever Rise N' Shine (Epic Doobie Nightmare #1) 214663 31994 0 0 3 image/jpeg
Estradasphere Buck Fever Bride Of The Buck 214664 31995 0 0 3 image/jpeg
Estradasphere Buck Fever A Very Intense Battle 214665 31996 0 0 3 image/jpeg
Estradasphere Buck Fever Green Hill 214666 31997 0 0 3 image/jpeg
Estradasphere Buck Fever Feed Your Mama's Meter (Remix 2001) 214667 31998 0 0 3 image/jpeg
Estradasphere Buck Fever What Deers May Come 214668 31999 0 0 3 image/jpeg
Estradasphere It's Understood Hunger Strike 293353 31972 0 0 3 image/jpeg 3190141 3 31972 iPod_Control\Music\F22\Estr.mp3 100 3 43735.8647790394 1 0 0 128000 44100 0
Estradasphere It's Understood Cloud Land 293350 31973 0 0 3 image/jpeg
Estradasphere It's Understood The Transformation 293360 31974 0 0 3 image/jpeg
Estradasphere It's Understood Danse Of Tosho And Slavi / Randy's Desert Adventure 293351 31975 0 0 3 image/jpeg
Estradasphere It's Understood The Trials And Tribulations Of Parking On Your Front Lawn 293361 31976 0 0 3 image/jpeg 3190143 3 31976 iPod_Control\Music\F26\Estr.mp3 100 5 43735.8647860301 1 0 0 128000 44100 0
Estradasphere It's Understood The Princes Of Xibalba: The Princes 293358 31977 0 0 3 image/jpeg
Estradasphere It's Understood The Princes Of Xibalba: Los Días Sin Días 293357 31978 0 0 3 image/jpeg
Estradasphere It's Understood The Princes Of Xibalba: XQuiQ 293359 31979 0 0 3 image/jpeg
Estradasphere It's Understood The Princes Of Xibalba: Hunnahpu And Xbalanque 293356 31980 0 0 3 image/jpeg
Estradasphere It's Understood Spreading The Disease 293355 31981 0 0 3 image/jpeg
Estradasphere It's Understood Planet Sparkle / Court Yard Battle 1 293354 31982 0 0 3 image/jpeg
Estradasphere It's Understood D♭ Hell 293352 31983 0 0 3 image/jpeg
Estradasphere Passion For Life Dissatisfactual Contraband 200495 94868 0 0 3 image/jpeg 3591161 104 94868 Music\Estradasphere\Passion For Life\01 Estradasphere - Dissatisfactual Contraband.mp3 -1 3 45857.5920181482 1 0 0 246512 44100 1
Estradasphere Passion For Life Feed Your Mama's Meter 200496 94869 0 0 3 image/jpeg
Estradasphere Passion For Life Planet Sparkle 200497 94870 0 0 3 image/jpeg
Estradasphere Passion For Life Bat Cave 200498 94871 0 0 3 image/jpeg
Estradasphere Passion For Life Hora Bucharestu Vs. Narodno Kolo (Gypsy Medley) 200499 94872 0 0 3 image/jpeg
Estradasphere Passion For Life Tugboat 200500 94873 0 0 3 image/jpeg
Estradasphere Passion For Life The Jailing Of Whoolilicious! 200501 94874 0 0 3 image/jpeg
Estradasphere Passion For Life Kiss Tomorrow Goodbye / The Red Chowder Trenchcoat Conspiracy 200502 94875 0 0 3 image/jpeg
Estradasphere Passion For Life Graze-A-Holic 200503 94876 0 0 3 image/jpeg
Estradasphere Passion For Life Danse Of Tosho & Slavi / Randy's Desert Adventure 200504 94877 0 0 3 image/jpeg
Estradasphere Passion For Life Elderly Normal Samurai Tortoises 200505 94878 0 0 3 image/jpeg
Estradasphere Passion For Life Boss III 200506 94879 0 0 3 image/jpeg
Estradasphere Passion For Life D-Flat Hell 200507 94880 0 0 3 image/jpeg
Estradasphere Passion For Life Body Slam (Lounge Version) 200508 94881 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Title 220887 32010 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Palace Of Mirrors 220878 32011 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors A Corporate Merger 220875 32012 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors The Terrible Beautypower Of Meow 220884 32013 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Colossal Risk 220876 32014 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors The Unfolding Pause On The Threshold 220885 32015 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Smuggled Mutation 220881 32016 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Six Hands 220880 32017 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors The Debutante 220882 32018 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Flower Garden Of An Evil Man 220877 32019 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Those Who Know... 220886 32020 0 0 3 image/jpeg
Estradasphere Palace Of Mirrors Palace Of Mirrors (Reprise) 220879 32021 0 0 3 image/jpeg 3190142 3 32021 iPod_Control\Music\F21\Estr.mp3 -1 0 43735.8647836806 1 0 0 192000 44100 0
Estradasphere Palace Of Mirrors The Return 220883 32022 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Title 279018 94905 0 0 3 image/jpeg
Estradasphere The Pegasus Vault 4 Hands 279030 94895 0 0 3 image/jpeg
Estradasphere The Pegasus Vault The Pegasus Vault 279019 94906 0 0 3 image/jpeg
Estradasphere The Pegasus Vault American Tough 279050 94896 0 0 3 image/jpeg
Estradasphere The Pegasus Vault The Return (Unplugged) 279020 94907 0 0 3 image/jpeg
Estradasphere The Pegasus Vault A Van For A Mystery 279049 94897 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Rendezvous 279021 94908 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Star Slyderz (Theme) 279053 94898 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Some Semblance 279022 94909 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Circuit Malfunction 279048 94899 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Alterna-Meow Intro (A=432 hZ) 279040 94910 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Smuggled Mutation (Cimbalom Mix) 279052 94900 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Neither Hide Nor Hair 279024 94911 0 0 3 image/jpeg
Estradasphere The Pegasus Vault The Return (Live) 279036 94901 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Report To Deck 279025 94912 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Ems (1998) 279051 94902 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Flower Garden (Midi Demo) 279038 94903 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Faceoff: Advocate Vs. Accuser 279041 94913 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Merry X-Mas Blobby 279039 94904 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Judgement Tunnel 279042 94914 0 0 3 image/jpeg
Estradasphere The Pegasus Vault Unicorns And Rainbows (Single Version) 279043 94915 0 0 3 image/jpeg
Estradasphere The Pegasus Vault The Pegasus Vault (Reprise) 279044 94916 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday The Silent Elk Of Yesterday 233714 94824 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Crag Lake 233701 94825 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Millennium Child (Live) 233706 94826 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday The Dapper Bandits 233711 94827 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday The Ventriloquist Choir 233715 94828 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Mikapses Yitonisa 233705 94829 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Burnt Corpse 233700 94830 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Rise 'N Shine (Edn#1) 233707 94831 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Disco Time 233702 94832 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday A Tune By F. F. C. 233698 94833 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday The Princes Of Xibalba 233713 94834 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday The Penguin 233712 94835 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Techno In The Style Of Burning Man 233710 94836 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Some Turkish Song 233709 94837 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Aunt Nellies Love Gravy 233699 94838 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Medley #3 233704 94839 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Some Irish Song 233708 94840 0 0 3 image/jpeg
Estradasphere The Silent Elk Of Yesterday Hungerstrike (Ending) 233703 94841 0 0 3 image/jpeg
[/code]

From this I could get no useful information. All albums have artwork except for "The Pegasus Vault". I see nothing distinctive in them that could pinpoint to an issue. The Covers table has the same info for all tracks, and the DevicesTracks/Devices only has info for some tracks, all of which have art, but some albums don't have any info and still have art as well.

Maybe I need a different query? I noticed that the Year field in the Albums table is empty, but the tag has a value, so I assume that is being stored somewhere else. So that could be the case for the artwork as well.

EDIT: It would help to know what the query is that MM uses to identify cases for the "Unknown artwork" node.

https://sqlitebrowser.org/ will allow you to view the backup MM.DB

https://www.mediamonkey.com/wiki/Covers_table

https://www.mediamonkey.com/wiki/DeviceTracks_table

https://www.mediamonkey.com/wiki/Database_Structure

Tried it, didn't work. I rescanned everything, but MM still thinks they have artwork.
I regularly do the maintain DB option (everytime I add new stuff), but did it anyway and still didn't fix it.

Honestly, I just want to identify which files are in this situation so I can fix their artwork. I don't even mind if I have to download some SQL editor for sqlite (which I think is what MM uses). But I have no idea what could be causing this.