I have been getting this notification every week now! It is driving me crazy! Why is this happening, and what can I do to make it stop!! It is getting really annoying!! Thanks in advance
If that is happening when you start Photoshop it may be because one of your user ID Photoshop preferences files is corrupted. Namely "Actions Palette.psp". This file is normally hidden on both the Mac and PC platforms. For example Windows 7 "C:\Users\Your User ID\AppData\Roaming\Adobe\Adobe Photoshop CS6\Adobe Photoshop CS6 Settings\Actions Palette.psp". That message may also happen if you try to load and action set where the ActionSetName.atn file is bad.
If it happen when you start Photoshop try resetting your userid Photoshop preferences.
When you load Action and when you create new actions they are saved into you Photoshop Preferences into Actions Palette.psp. This File is read when you start Photoshop.
Apple and Microsoft both like to hide important files on users. Windows search and Apple finder will not find and show hidden files unless you change Mac and Windows setting. I you getting the error when you start Photoshop there is a shortcut to reset preferences. Hold down Alt, Ctrl, and Shift keys (Mac: Command, Option, Shift) while starting up Photoshop you should be prompted to for an OK to delete preferences.
If this keeps happening perhaps you have a bad spot on your disk. Loaded actions are saved into that file so they should show up in the Actions Palette when Photoshop Start Up and read that file during start up. Photoshop Writes that file when you load action sets, when you record and edit actions and most likly also when you close down Photoshop.
If this is happening when you start Photoshop. Stop Photoshop. Then use finder and set the mac settings to search for hidden files and find "Actions Palette.psp" rename that file so it still exists and occupies the space allocate to it. Then start Photoshop it should not find the renamed file and create a new default "Actions Palette.psp" file one with only the default action set loaded. You should not get the message. Next start loading you action sets one at a time. They should load without any error message. Once all are loaded close down Photoshop and the restart Photoshop. You should not get the error message and all your actions should be in the Actions palette.
This link may help with hidden files http://helpx.adobe.com/x-productkb/global/access-hidden-user-library-f iles.html
You might want to try SAVING those actions sets you still can see out to .atn files BEFORE deleting the entire Actions Palette.psp file. Otherwise you chance losing them forever if they're not already saved elsewhere.