Eclipse "Problems" view, don't understand error message

I had been following the directions from "My First Nios II Software Design", creating the Hello World Small project.

It had been going all right, seemed to work as expected. I downloaded the program to my FPGA and tried to run it, but I didn't get the "hello world" message as expected.

I tried a few things, then went back to Eclipse to try again. Now I get an error in the "problems" window when I "Build project"

Description Resource Path Location Type

make: *** [../DMI_Hello_World_bsp/-recurs-make-lib] Error 2 DMI_Hello_World C/C++ Problemmake[1]: *** [public.mk] Error 1 DMI_Hello_World C/C++ Problem

The "hello_world_small.c" file is unchanged from the original, and I haven't intentionally changed anything else.

What it is telling me?

Rod