Error:Project could not be loaded

Issue
Premiere Pro produces the error message "Project could not be loaded. It may be damaged or contain outdated elements."

Possible Solutions

 * G Clarkin said:
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 * After screaming, running around the room tearing my hair out and generally believing my world had come to an end I just double clicked on the project file which opened a 2nd Prem application and hey presto, Bob's your uncle, it worked!!! Don't ask me why, it just did. Next thing I did was close them all down, restart Prem, open the file within Prem - didn't work again!! Closed Prem, double clicked on the file and it worked!!! It also works opening the project within Prem when I had 2 Prem apps open - but not when I had one open.
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 * Merlin Biggs reported that re-installing Premiere Pro fixed this for him.