I can't configure linux kernel under Nios II IDE

Hi,

while I try to configure a linux kernel under Nios II v5.0 (right click configure kernel ) the msdos window indicates:

/usr/bin/bash: line 1: de: command not found

Usage: cygpath (-d|-m|-u|-w|-t TYPE) [-c HANDLE] [-f FILE] [options] NAME

cygpath [-ADHPSW]

then some help then:

no emulation specific options

after that the window closes up !

Please can anybody help me. Thnx