NetBackup tape duplication must be performed with the multiplex option when Sybase striping and the NetBackup multiplex (MPX) feature are used for a Sybase backup. A problem occurs when multiple Sybase stripes are multiplexed to a single tape and then the tape is duplicated without using the -mpx option. The duplicated tape must be created with the -mpx option on the bpduplicate command. This is also accessible as the Preserve multiplexing checkbox on the Duplicate Backup Images window. In addition, all of the backups from the original Sybase multiplexing session must be included in the duplicated multiplexed group.