Error 3256
Severity Level 16
Message Text
The backup set on device '%ls' was terminated while it was being created and is incomplete. RESTORE sequence is terminated abnormally.
Explanation
The backup operation that created the backup set did not finish successfully. You can only restore backup sets that were created successfully. For example, the backup may have been terminated with an attention message. The backup set is not complete, and the restore operation must terminate.
Action
If you were restoring a database backup, restore a different database backup, and use log backups to roll forward. If you were restoring a log backup, apply the next log backup, the log backup made following the incomplete backup, instead.