CCFileUtils | Unable to read files on restart the game

Hi,
I am trying to implement restart functionality in my game, I can restart game 3 times successfully. But when i retry it for forth time it gives me error Get data from file(PATH_TO_APP_FILE/tile_test_2.tmx) failed!

I happened for ccbi files also. .png files are loading perfectly.

Any suggestion or hints will be appreciated.

Thanks,