You would have to add the Qimage program folder and application data folder.  In Qimage, go to Utilities, Explore Qimage Application Data and exclude that folder (and all subfolders).  Also exclude the program folder which is typically \ProgramData\ddisoftware\Qimage, on the C: drive or whatever is your Windows drive.

Regards,
Mike

Mike,

Thanks for the follow up. I did a full PC restart aswell as application start but issues persisted. Just before I finished work yesterday, I switched off all the the AI settings and managed to restart QUI, without getting the error. I will need to test further today to see if that holds out. Is Qimage.exe the only process that I need to add to anti virus exclusion list? (I did this already). Oh I added the folder that I am reading images from too (just to test).

Will report again later.

Regards
John

I don't really have much to go on with that one.  That information dialog is telling you it never got past the "4-exist" stage and the only thing happening between stage 4 and stage 5 is initialization of some variables.  If it fails there, the only thing I can think of is bad RAM or antivirus.  The other (actual) error message is more important: the one that says "Cannot wait for an externally created thread".  Can you get a screen snap of that one, particularly if it mentions an error address?

One thing you can try is starting Qimage with the Shift key held so it resets all settings: if a corrupted setting is involved, that would clear it.  Might also be worth a try to reboot the PC and see if that solves it if you haven't already; you mention application restart but not a full PC restart.

Regards,
Mike

Hi folks

QIU is running very erratic today for me. I have added a screenshot of the error message. Udated to latest version. No change. Eorror message appears after every application restart. Thumbs keep trying to reload even though they were just built/rebuilt on last attempted restart. Also seeing another error "Cannot waitr for an externally created thread. I added Qimage.exe to antivirus exclusion list, ran disk checks (all good), checked for HDD space (all good). The image files are loading from a dropbox synced folder that resides on a dedicated storage disk (been using this for years without issues but thought I would mention it). I'm on a Windows 11 PC with a reasonably high spec workstation. Strangely when I clear obove error it start rebuilding thumbs again. (Only 6 images in folder I am accessing, all TIFF files).

Any ideas?

Regards
John

Mike, Thanks for the explanation. Something I never noticed before.  I'll just have to keep an eye out for the file sizes on my drive.

I have to guess what you're talking about.  Since you said "opening to Qimage..." maybe you mean you open them in Lightroom and then send them to Qimage with the plugin?  That's the only way a .tif file will be created: Lightroom creates it when you export because it is the only way Lightroom can export images.

Regards,
Mike

Opening Nikon .NEF images to Qimage Ultimate creates a .tif file. is this supposed to create a .tif file? I don't remember this happening. Do I have an incorrect setting in Qimage Ultimate?

OK.  Fixed in 2026.103.

Regards,
Mike

https://www.ddisoftware.com/qimage-u

2026.103    Aug 18, 2025

Priority: Med

v2026.103 corrects an issue where the new DFSv2 sharpening could produce a slight tint in pure white areas.

Mike

https://www.ddisoftware.com/qimage-u

2026.103    Aug 18, 2025

Priority: Med

v2026.103 corrects an issue where the new DFSv2 sharpening could produce a slight tint in pure white areas.

Mike