what is this matter: "spawn: Invalid argument"

From: jq54he (jq54he_at_[hidden])
Date: 2003-11-24 10:18:10

hi,all

i run this:
C:/boost_1_30_0> bjam -sBOOST_ROOT=. -sTOOLS=vc7 "-sBUILD=debug 
release <runtime-
link>static/dynamic"

the result is 
...found 2219 targets...
...updating 303 targets...
MkDir1 libs\regex\build\bin-stage
spawn: Invalid argument

what is the meaning of this message?
i think i had done all the config work.