can not built Error in build: （sos！！！）

hi~~

i meet a big problem about built project.

In the NIOS II IDE, when I try to built a hellow world project, it appears that

Error in build:

(Exec error:Launching failed)

Error launching external scanner info generator (gcc -E -P -v -dD D:/nios/nios2eds/bin/eclipse/nios2-ide-workspace-9.0/.metadata/.plugins/org.eclipse.cdt.make.core/specs.c) hello_worl Unknown 1298293345359 6

Error launching external scanner info generator (gcc -E -P -v -dD D:/nios/nios2eds/bin/eclipse/nios2-ide-workspace-9.0/.metadata/.plugins/org.eclipse.cdt.make.core/specs.c) hello_worl_syslib Unknown 1298293345156 5

how can i sovle the problem~~