I did try to divide them to sub groups.
This time, the problem is out of memory.
I have already bought a 512MB RAM. ><"
Now my pc has 256+512MB RAM.
Later,I will go out to buy another 512MB.
This hw is very very very expensive............
※ 引述《anguso (愛寶)》之銘言：
: You have to split them into small groups.
: