[Tinyos-help] Tossim problem

[b m]

The following error occured :
   
  [root at localhost Blink]# make micaz sim
  /opt/tinyos-2.x/support/make/Makerules:164: ***
   
  Usage:  make <target> <extras>
          make <target> help
   
          Valid targets:
          Valid extras:
   
   Welcome to the TinyOS make system!
   
   You must specify one of the valid targets and possibly some combination of
   the extra options.  Many targets have custom extras and extended help, so be
   sure to try "make <target> help" to learn of all the available features.
   
   Global extras:
   
     docs    : compile additional nescdoc documentation
     tinysec : compile with TinySec secure communication
   
  ERROR, "micaz sim tos-ident-flags tos_image" does not specify a valid target.  Stop.
  [root at localhost Blink]#
     
  what is the problem? , with the knowledge that i use RedHat 9.
   
  Thank you.
   

       
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