Sid Meier's Alpha Centauri is crashing in the late game. Is it a resources problem?

There are several possible causes:

  1. Your system may not have all necessary patches, listed here — namely, smacp4e and smacxp103fus;
  2. There are some old builds that cause crashes when an Air interceptor-capable unit is set to Sentry on a friendly base (Shift+L), that base get attacked by an enemy's bomber, and your unit automatically stands up for protection. The symptom is that the crash occurs during the AI move, and you don't really see at what moment it crashes (link, link).