Random Shutdowns

Hi,

Having an issue with my MBP. It is randomly shutting down with no on screen prompt. Yesterday I updated to 10.9.2, this morning it has shutdown twice in 1 hour. Looking at the system logs the following is displayed when filtering for shutdown:

07/03/2014 09:52:46.006 com.apple.launchd[1]: *** Shutdown logging is enabled. ***

07/03/2014 09:52:48.000 kernel[0]: Previous Shutdown Cause: -102

07/03/2014 09:52:49.743 locationd[59]: locationd was started after an unclean shutdown

07/03/2014 10:41:28.827 com.apple.launchd[1]: *** Shutdown logging is enabled. ***

07/03/2014 10:41:30.000 kernel[0]: Previous Shutdown Cause: -102

07/03/2014 10:41:32.436 locationd[57]: locationd was started after an unclean shutdown

The following is my hardware overview:

Model Name: MacBook Pro

Model Identifier: MacBookPro9,2

Processor Name: Intel Core i5

Processor Speed: 2.5 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

Memory: 16 GB

Boot ROM Version: MBP91.00D3.B08

SMC Version (system): 2.2f44

Serial Number (system): C0*******TY3

Hardware UUID: ****

Sudden Motion Sensor:

State: Enabled

Any ideas as to what Previous Shutdown Cause -102 is?

<Edited By Host>