If you see this error message
CCA-ND-8062: Exception - Unable to lock Network Discovery scan database..
Please use these steps to resolve it:
Stop all Network discoveries if you can, then on the NDG:
1. Stop CCA (NDG) Services
2. Got to :\Program Files\CA\SharedComponents\NDG\db
3. Need to delete all files except NS_COMMON.sq3
4. Start CCA (NDG) Services