Thanks for reply.
Let's open a new thread with this new issue. In this way the thread will get more visibility and more resources can be engaged.
Please make sure you include all the issue details.
Can you show me the command which was executed. Also please let me know the below things...
1. Version of Tableau?
2. Make sure the service account used have all the folder level permissions.
3. You are facing this issue for the first time after moving to the windows server 2012?
When I've seen this in the past, it's been a permissions issue. Can you verify that the service account for Tableau Server has permissions to the temp directory and the directory that the backup will be stored in?