Bootcachecontrol:unable to open...

Hi,
My Macbook pro won't start, it just shows the apple logo and the spinning gear. When I tried to boot in safe mode, tha last two lines read: "
Bootcachecontrol: unable to open/var/db/bootcache.playlist:2 no such file or directory
Launchctl: dubious file. Not of type .plist (skipping): /system/library/launchDaemons/com.apple.installer.osmessagetracing.plist~orig "
Can anybody please tell me what's wrong and/or how to fix this please??
Thanks.

Boot into Recovery by holding down the key combination command-R at the startup chime. Release the keys when you see a gray screen with a spinning dial.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.
When the OS X Utilities screen appears, follow the prompts to reinstall the OS. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.

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    Looked in the trash bin and there it was, all the information previously deleted..
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