求救？我在PB定制WINCE内核的时候出现了一个错误

我在PB4.2下定制WINCE，build时出现1个错误，系统提示参考WINCE420目录下的build.err文件，文件的内容如下：

Starting sysgen phase for project ( common )
Found localized resources for Languages ( 0404 0407 040C 0410 0411 0412 0413 0416 041D 0804 0C0A)
Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.
makefile.def: BUILDROOT is D:\WINCE420\public\common\cesysgen
Creating appropriate directories and deleting COMMON.LOC
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtcmtr.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtconv.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtcpu1.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtcrtw.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrteh.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtfcnv.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtfpw.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtfpw1.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtheap.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrthelp.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtlowi.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtmisc.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtrtti.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtstcp.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtstio.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtstrg.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrtstrt.pdb
D:\WINCE420\public\common\oak\lib\ARMV4\retail\ccrttran.pdb
复制了 18 个文件
D:\WINCE420\public\common\oak\lib\ARMV4\retail\strsafea.pdb
复制了 1 个文件
nmake  /NOLOGO D:\WINCE420\PUBLIC\ARM241~1\WINCE420\smdk2410\cesysgen\sdk\lib\ARMV4\retail\corelibc.lib
makefile.def: BUILDROOT is D:\WINCE420\public\common\cesysgen
link -lib -ignore:4001 -out:\WINCE420\PUBLIC\ARM241~1\WINCE420\smdk2410\cesysgen\sdk\lib\ARMV4\retail\corelibc.lib -machine:ARM @C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\nma02800.
'link' 不是内部或外部命令，也不是可运行的程序
或批处理文件。
NMAKE : fatal error U1077: 'link' : return code '0x1'
Stop.
NMAKE : fatal error U1077: '"D:\Program Files\Windows CE Platform Builder\4.20\cepb\bin\nmake.exe"' : return code '0x2'
Stop.
Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.
Cefilter platform files
cefilter D:\WINCE420\platform\smdk2410\files\config.bib D:\WINCE420\platform\smdk2410\cesysgen\files
Cefilter for Windows CE (Release) (Built on Oct 31 2001 15:19:05)
cefilter D:\WINCE420\platform\smdk2410\files\platform.bib D:\WINCE420\platform\smdk2410\cesysgen\files
Cefilter for Windows CE (Release) (Built on Oct 31 2001 15:19:05)
cefilter D:\WINCE420\platform\smdk2410\files\platform.dat D:\WINCE420\platform\smdk2410\cesysgen\files
Cefilter for Windows CE (Release) (Built on Oct 31 2001 15:19:05)
cefilter D:\WINCE420\platform\smdk2410\files\platform.db  D:\WINCE420\platform\smdk2410\cesysgen\files
Cefilter for Windows CE (Release) (Built on Oct 31 2001 15:19:05)
cefilter D:\WINCE420\platform\smdk2410\files\platform.reg D:\WINCE420\platform\smdk2410\cesysgen\files
Cefilter for Windows CE (Release) (Built on Oct 31 2001 15:19:05)
Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.


请问各位高手是什么原因？