[UR] Submitting dng file which IM can not process.

[ubacher]

The Samsung Galaxy S23 Ultra phone can produce 50Mp raw files.
Some of these files IM can not display.
I will send an email with links to two such files to support.

[Mario]

Which other software did you try?

In IMatch, do you use WIC or "photools.com RAW Processing"?
If photools.com RAW processing is not enabled, enable it and then force a rescan of the affected images.
(photools.com RAW processing is the default for new IMatch installations since 2025).

IMatch includes and uses the latest version of the official Adobe DNG toolkit.
When it does not handle the DNG files produced by your phone, there is nothing I can do.

[Mario]

I have downloaded the 3 sample DNG files you provided.
All files load fine, thumbnails produced, large previews / cache images produced.

I've asked above if you have photools.com RAW processing enabled.

If not, you are using WIC, and Microsoft did probably not update the DNG WIC codec to include support for the latest DNG files with JPGXL previews. 

Enable photools.com RAW processing and force a rescan of the images.
I've spent several days with integrating the Adobe DNG SDK with LibRaw for IMatch 2025, exactly for this purpose. To support the latest DNG formats variants. So many format variations around already.

[ubacher]

I do have  photools.com RAW processing enabled!

Since other files with the same settings did get indexed OK it must be some weird other problem.Timing?

I do have it happen frequently that ingested files do not show the thumbnail but on forcing a rescan produce the
thumbnails ok. I am waiting for a clean case of this to submit a log file in debug mode. 

The submitted files do not get fixed via a rescan - this made me think it is some quirk in the file. But WIC diagnostics
also shows no problem! Windows shows the thumbnail, Irfanview can show the files,  photoshop has no problems with it.

I just created a new database and loaded the 3 files without problems! Then I tried adding those files to a large db (400k files) - again no problem! 

Where could I look for potential causes?

[ubacher]

Ha! I found the reason. In the cache settings I had maximum file size set to 100Mb. The troubling files are above this.

But I surely have PSD files which are above the limit - and they display OK.

The question is: what is IM supposed to do when a file is above the maximum. Should it not just NOT store the file in cache?  

PS: in the other db where I tried the files I had caching turned off.