Hi
On my PC laptop ran out of power when playing back a file created in Premiere Pro CC 2014.
When I re charged and used the ac power connector on double clicking the file on opening the package the following message appeared . . . project appears to be damaged it cannot be opened. Tried other projects which have opened but on trying the problem file same message appears. Attempting accessing the archive by right clicking on the file does not open either.
Have you tried creating a new project to see if it can be played. You might have to remove Premiere and run the cleanup script and reload Premiere.