The dates are named and are of the format: exif:DateTimeOriginal: 2006-04-16T06:53:04.24-04:00 and exif:DateTimeDigitized: 2006-04-16T06:53:04.24-04:00. When I run the commandline exiftool "-DateTime Original+=1:: 0" h:\redate, I get the message "Warning: entries in IFD0 were out of sequence. Fixed." -h:\redate/_DSC0328.NEF. It does update one of the fields, though. When I run this using -AllDates, all date fields get advanced by 1 year, including some that don't need to be. That's the characteristic of -AllDates, I suspect.

I ran the -AllDates against some files that had both .nef and .xmp. It did only 1 .xmp, and changed only the DateTimeOriginal. The DateTimeDigitized was not changed. I would like to change only the DateTimeDigitized and DateTimeOriginal in both exif and XMP areas. Is this possible?

Thanks for your quick response.

I think that I found at least one of the problem areas. The .nef files that I was converting the dates on had all been touched either by Adobe Bridge or IDimager to add keywords. this must have messed with the order. When I ran exifTool against some .nef files that were "untouched" right out of camera, the date correction ran OK with no error messages.

The program will change the DateTimeOriginal and nothing else, if I put that in the command line, i.e. exiftool "-DateTimeOriginal+=1:: 0" h:\redate. all dates get changed if I run this with AllDates. The command line won't run if I use DateTimeDigitized. Is It possible to change only DateTimeOriginal and DateTimeDigitized, and not change ModifyDate. Is CreateDate the command I should use to change DateTimeDigitized? I will go check that.