This symptom can result if the file-modification date of the XMP file is OLDER than the RAW file and the XMP already exists before opening in ACR, so “touch” or otherwise edit the xmp files so that they have the current timestamp.
Ah... so if I rename all of my files in, say, Photo Mechanic (which also renames the .xmp files), or add metadata using photomechanic after making the adjustments in ACR, that could trigger this symptom?
Thank you very much
There have been a few users that have exactly your problem, raw edits do not take, on some, but not all images. In those cases it turned out the camera clock setting was an hour or two ahead of time so the program would not make in changes. Computer figured the pictures had not been taken yet and you can not edit for future possibilities I guess.
Anyways syncing the camera to correct time worked so edits would be executed.
Thanks, Curt Y, but I don't think that is the answer in this case. Camera settings are accurate, edits are made days later...