Backup Exec Alert: Job Warning (Server: "DC-XXXXXXXX") An unknown application is deleting files from the following folder:

I am using Backup Exec 2014 on my sever. I recieve the following error in event viewer.

Event ID: 33919

Backup Exec Alert: Job Warning
(Server: "XXXXXXXX") An unknown application is deleting files from the following folder:

 C:\ProgramData\Symantec\CRF 

Files contained in this folder are used by Backup Exec, and deleting them may cause Backup Exec processes to crash. Determine which application is accessing the folder and add the folder to the application's exclusion list. 

 For more information, click the following link: 
http://entced.symantec.com/entt?product=BE&module=eng-event&error=V-379-33919&build=retail&version=14.1.1786.1093&language=EN&os=Windows_V-6.1.7601_SP-1.0_PL-0x2_SU-0x110_PT-0x2

HOW TO SOLVE THIS ISSUE?