And a good thing too, because it absolutely does happen and is caught before testers even get a whack at it. Charles has code that checks to make sure things aren't dropped between versions. There should be no backwards compatibility with the TO&E, though theoretically it can happen. Sometimes pretty much nobody can use a save game, sometimes it is purely circumstantial. It totally depends on what code was changed and if a particular save state has a value stored in it, and used again, which the new version of the game doesn't like. save games very often work fine after a patch. However, as many of you have found out over the years. This has been true since CMSF1 and will continue through until the end of time. It is why we always suggest players finish up games in progress before patching.

An OME (Out of Memory Error) is a sign that something in the save file is not as the game expects and things go very badly as a result. Unfortunately save games (and PBEM is at its core a save game) sometimes don't work because of a code change. There should be no backwards compatibility problems with the TO&E, though theoretically it can happen.

Battlefront 2 beta code not working