ALLＥGRO封装

ALLＥGRO封装保存时（封装中以有添加了refdes：Ｕ＊）老出现以下提示：
( Create Symbol of type PACKAGE )
( )
( Drawing : QFN_28.dra )
( Software Version : 15.51p003 )
( Date/Time : Mon Jun 02 20:31:55 2008 )
( )

Create symbol started.

Symbol is missing a refdes.
Symbol is missing a refdes.
Create symbol aborted.
Create Symbol Aborted, error = Symbol is missing a refdes.
封装中以有添加了refdes：Ｕ＊，
请高手帮忙指点下，谢谢！