Hi Darryl,

Close. Just use an "=" sign instead of "<" and it should work.

The "<" syntax is used to copy the value of one tag to another by name, and since a tag called "sunrise on I-80 %-4f.%e" does not exist in the file, nothing happens.

And the -w option specifies the output for text output of exiftool. If you had used the -o option instead, the file would have been rewritten to an output JPG file with the specified name, but this isn't quite what you wanted either because it is much slower than simply renaming the file as when you set the filename tag.

I hope this makes sense. And btw, thanks for helping Marty and the other smugmug people with your useful posts over there.

- Phil