When trying to run OS Build Plan from the SA Java Client, the error is: "File Not Found".
Although the user has all permissions and privileges to perform any opperation in SA, this still indicates a permissions issue.
The fix is to grant the user with permissions for the OS Provisioning folder also:
1. Into the SA Java Client go to Library and select By Folder -> Opsware -> Tools -> OS Provisioning
2. Right click the folder and choose Folder Properties and go to Permissions
3. Choose the User/User Group accordingly and grant read, write and execute permissions for the objects within the folder.