error in niosII?

hello,

I do build a code in C ++ under NiosII but i have always this error

Severity and Description Path Resource Location Creation Time Id

/cygdrive/c/altera/61/nios2eds/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.1/../../../../nios2-elf/lib/libc.a(unlinkr.o) In function `_unlink_r': sept_0 line 0 1284459392109 70279

can somone help me to solve this problem

thank you