The problem most probably is with the map Japan Big.
In my game, it happens always when a big craft (Harvester) lands in an Eastern country, and the location is "classic eastern suburban area" or so. If I shoot down a small craft (a Scout or a Fighter), there is no problem.
I read a discussion somewhere on the web, saying that the game mistakenly uses a Japan Small map, even if there is a large landed craft. Because of that, the game cannot fit the large craft on the small map, and crashes to Windows. If, however, there is a small craft, it can fit on the small map and everything is OK.
This can be supported by the fact that even in the Skirmish mode, if I select the Japan map with a big craft, the game crashes completely the same way like in the Campaign.
I even tried to find the Japan map files, deleted them, took some Arctic map file, copied it and named the new file same as the Japan map file. It was a partial success, the battlefield assembled, there was a big snowy map, the harvester was there, but otherwise it was messy. So my stupid repair attempt after all failed.
If someone is able to repair the Japan Big (Small?) map, please help the Earth. So far, I have to ignore the harvesters landed in China and must wait till the bastards leave by themselves, taking that poor human victims to their filthy home:-)
Thanks,
Andrew