Installing the DAS 1.2.1 MPack

You must install the DAS 1.2.1 MPack on the same host on which you had DAS 1.2.0 running before the upgrade.

Install the DAS 1.2.1 MPack on the Ambari host by running the following command:
```
ambari-server install-mpack --mpack=<mpack-name> --verbose
```
Replace the <mpack-name> with the name of the DAS 1.2.1 MPack. Typically, the format of the MPack is hdpx-data-analytics-studio-mpack-X.X.X.tar.gz.
Restart the Ambari server by entering the following command:
```
ambari-server restart
```