Hi all,

I have a sequence where 4 photos (out of 500) are not building the visual preview and I can't understand why.

Please let me know what info you need to understand the issue.

Thank you.

Close LRTimelapse, reopen it, load the sequence again. Turn on Visual Previews, and see if they get generated now.
If now, those images might be corrupt and you should remove them from the sequence.