EE2007.5原理图forward到PCB时提示没有part number是怎么回事？

如下，提示没有part number，是不是我库的问题?库里面都有号的啊  以下是在package原理图时的出错提示
        Commandline is: "C:\MentorGraphics\2007.5EE\SDD_HOME\wg\win32\bin\package.exe -jC:\MentorGraphics\Projrct\test\test.prj -nDesign1 -i -Block=Schematic1 -k -Add"
     The Common Database is at "C:\MentorGraphics\Projrct\test\database".
     The Root of this design is "Schematic1".
     The Front End Snapshot of this design is "DxD".
     The PCB Design Path of this design is at "C:\MentorGraphics\Projrct\test\PCB\Design1.pcb".
     The Central Library is at "C:\MentorGraphics\Dx_Lib\Dx_Lib.lmc".
      The "-Block" option is not compatible with the "Repackage All" or "Repackage Unfixed" options.

以下是在forward原理图到PCB时的出错提示
ERROR:  There is no Part Number: DEV in the Parts
      DataBase for symbols with Part Name: (null) and Part Label: (null).
      [Please add the Part Number to the PDB either directly
       or by having the project file point to a PDB that contains it.]
       The relevant symbols are:

你中心库没有建part吗?

我后来发现是没有输入元器件PN等属性，必须要输入和中心库一样的PN才行，由于我没搞DXdatabook，所以比较麻烦