The folders that contain the archived files are always on my second screen
If in Windows (a Mac user would have to speak to this for that environment) -
If Windows Explorer is "focused" on the file (i.e., file selected) or has "focus" on the file(s) parent folder/directory you will get the alert dialog.
Close Windows Explorer or place its focus elsewere.
Also, if the preview feature is used for files within a folder (or for files in nested sub-folder) you'll experience similar "speed humps" in the work flow path.
Was not always this way but OS updates (XP, Vista, etc.) appear to have given us some nifty new options that, coincidentally, pose some gotchas.
I think you're right. I was mistakenly believing that as long as the file being resaved wasn't "checked" (selected), all would be well. But in the "details" view I use, a preview is being displayed.
However, even when I click to a different folder in my directory tree (so that the focus changes), this error message still sometimes appears.
It's probably 50-50% whether it does or doesn't.
It is Windows 7 that is causing the issue - disable the preview feature in Explorer. This feature causes Adobe to open another process using the file.