When you issue a REQUEST=UNLOCK_CASTOUT request, you must specify a buffer that contains the list of name elements. You can use a single buffer (the BUFFER keyword) or multiple buffers (the BUFLIST keyword). Either method enables you to build a maximum of 2048 name elements.

For information about whether to use a single buffer or multiple buffers and for information on selecting buffer attributes, see Design Considerations for Choosing the Buffer Format.