Bonjour Jean Guy,
Looking at your attached screen shot, the first images (prior to the warning message) seem to have a very large pixel count (X and Y dimensions) compared to that of the 'warning' image.
As a QHY10 user myself, I always see the 3896 x 2612 dimensions in my FITS images. I don't know how, or why, you are seeing images with pixel dimensions of 4656 x 3520. These far larger images represent a 'standard' QHY10 image with a border of 380 pixels on the left/right sides, and 454 pixels on the top/bottom sides. I have no idea how a QHY10 camera vould provide images with these dimensions.
Were the first group of images taken with the QHY10?
Have you tried to 'Blink' all of the images excluding the initial group?
What software are you using to capture images, and is it possible that any settings might have changed since those you acwuired the previous evening?
Are you, in fact, trying to blink images from the previous night with the new batch of images acquired yjereafter?
Perhaps you need to open the first group (or, at least one of the first group) of images alongside the image that is 'failing' (but yet is the 'correct' size for a QHY10 imager.
I am convinced that this is not a PixInsight issue - the reason for the actual failure (i.e. the differing image szes) is clearly indicated in the Console Output.
Hope this helps.
