Hey there, Cardinal won't modify your EXIF data or your files in any way. The errors you see happen when the indexing service runs into something unexpected when reading, not writing, EXIF data.

Are you seeing that error for every photo, or just a few?

I'm still working through the edge cases that can come up when indexing photos. For these photos, if you are willing to post one here or send me one in private, then I'll fix whatever bit of EXIF parsing is causing that error.

If not, no worries I have a few files of my own giving me issues and an upcoming update might fix it for you.