Rome total war error memory could be read..

[euglent1993]

Hi every one... I am playing Rome total war v1.5 for quite a long but now when i end the turn it shows me this table and it closes my game automatically...
Can anyone help me because it is not the first time that Rome total war shows me this problem... plz help

[irishron]

The game ran out of memory. Save and restart the game every so often.