Fatal Error happened during FFT block compilation

Hi, thanks Pletz for helping me. I had tried to generate to fft block again but still the same result. Somehow I just can't seem to be able to use the block. Maybe the way I generate it is wrong, cause when I tried it in another computer the same error message appear. Let me explain my steps again, see if I missed anything that could lead me to the error.

1. First, I create a new project directory at c:\altera\projects\fft_project

2. Then, I generate fft megafunction under a project with the name fft.qpf,

so the vhd code generated is located at

c:\altera\projects\fft_project\fft.vhd along with other files such as fft.bsf,

fft.qip, fft_tb.v, fft_tb.vhd and many others.

3. After that, I create another project with the name fftwork.qpf. The

location of the project is c:\altera\projects\fft_project\fftwork.qpf

Under that project, I create a block diagram file (bdf) named fftwork.bdf.

Inside that bdf file, there is the fft block. fft.qip is added to the project

using settings (assignments). I get the same error message result

regardless if I connect the fft block pins or not. The compilation stops at

23% everytime.

Is this a wrong way to use IP megafunction? And also, I tried generating Reed-Solomon decoder with the same method and I still face the same error message. I am running out of idea anymore to solve this problem. Do you have any other suggestions?