Altera DE2 Ethernet Controller Demonstration

What version of Quartus II and Nios II to use?

I tried twice, v5.1 and v9.0, both failed.

I followed the instructions below:

1. Copy DE2 demonstration NET module from Altera Demo CD to your computer.

<cd drive letter>:/DE2_demonstrations/DE2_NET

2. Read README.txt included in the demonstration design.

3. Connect the DE2 board with a switch using a network cable.

4. Connect the DE2 board VGA output with a monitor.

5. Compile the demonstration module.

6. Run the design by programming it onto the DE2 board.

But when I was building the project in Nios II, I got the error:

/bin/sh: fork: Resource temporarily unavailable

cygpath: can't convert empty path

/cygdrive/c/altera/90/nios2eds/components/altera_hal/build/system_rules.mk:120: /components/altera_hal/build/gnu_rules.mk: No such file or directory

/cygdrive/c/altera/90/nios2eds/components/altera_hal/build/system_rules.mk:124: /components/altera_hal/build/gtf_rules.mk: No such file or directory

make[1]: *** No rule to make target `/components/altera_hal/build/gtf_rules.mk'. Stop.

I searched online, didn't find any solutions. Could anyone help me?

Thanks a lot!

Yuping