Big Cities problem

[LCSL]

When my city is growing too much :D and my occuped almost all the space of the map the game closes :eek: and appear a window that says "Runtime error" or "Sim City Societies has encountered a problem and needs to close!":mad:

Why it happens to me and how to fix it?


My system specs are:
Windows Vista Ultimate
Pentium IV 3.0Ghz
GeForce 8600GTS 256mb
1GB RAM
160GB HD
ASUS P5VDC-X