Sorry about the confusion. I am using a workflow which integrates some 
older versions in lightroom. I am presenting the lightroom workflow as it 
triggers an error log on my mac. A log which is not triggered when running 
align_image_stack on command line directly.

My conclusion is that too big files will trigger the issue and in lightroom 
aligning will be skipped. If files are below 3000 pixels all is working 
with --gpu enabled.
THis is the error log triggered when testing in lightroom. In this error 
log I am using the official binaries from 2019 taken from here 
*Hugin-2019.2.0.dmg*:
https://pastebin.com/86LH3W52

Oki, the other attempt is when working from command line. I am know in 
Hugin application itself and I am testing:
align_image_stack -a prefix --gpu drag/three/images/here
This is giving those corrupted halfwritten files . However. I am then 
testing reducing my test fiels to around 3000pixels. This actually works 
and --gpu will then produce correct files. So THis is how far I have come 
around the issue. I can verify at least three more users with these issues 
on M1 graphics card. Is there anything we could test here :)? All tests has 
now been performed with *Hugin-2019.2.0.dmg.*

 And again! Thanks for this program. I love it.
onsdag 15 mars 2023 kl. 18:47:15 UTC+1 skrev T. Modes:

> [email protected] schrieb am Sonntag, 12. März 2023 um 18:22:14 UTC+1:
>
> Hi! I did some more research here and I also triggered some error log 
> which I put into pastebin for viewing.
>
> I also notice following. Reducing file size to around 3000 pixels from 
> 4000 pixels processes the file just fine with --gpu enabled. So I guess 
> size matters here? Maybe related to some race condition in graphic 
> card/memory? Only speculating here.
>
> Also triggered debug log message: *narrowing channel width for output as 
> "uint8"*
>
>
> Sorry, but I'm lost. First there are corrupted images, then it crashes.   
> Next time you post debug messages from a 2014 version. 
> Then you mentioned unsupported framebuffer format. This issue was fixed in 
> 2016.0.
> So each time the error changes, this makes it hard to do anything 
> substantial.
>
>

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