Cannot Rollback to the most recent version of <File>

This error has the following cause and solution:

• Rollback is a function that allows you to destroy permanently all file versions from the most recent version to the version indicated with the –V switch.  However, the version you've indicated in the –V switch is the most recent version and therefore no rollback has been performed.

  Use the ss history <File> command to see if there are older versions of the file.  Then use one of the older file versions with the ss rollback <File> -V command.