After installing AE CC through the Creative Cloud Application, it fails to launch stating
After Effects warning: Could not rename the file '/Users/rickyline/Library/Preferences/AdoberAfterEffects/12.2/Workspaces.
Click Ok, then it says unexpected failure during application startup.
I have updated the app and it still fails.
Has anybody come acroos this and know how to fix it.
Sounds like you have a permissions issue with your file structure.
You haven't mentioned what OS you're using, but I'm guessing the latest Mac OS. If so, I'll bet you upgraded your OS rather than doing a clean install. No problem though, just set the permissions on the folders correctly and you should be fine. (There were several threads about this when Mavericks was first released.)