REAssaultKMK_COMPreston is a random encounter in which a former Minuteman is being attacked by raiders. This attack is only meant to happen while Preston Garvey is the player's follower, and as a result has Preston as an alias and has some very strict conditions on the quest itself. However, Preston's alias will never fill, which prevents the quest from running and thus prevents the encounter from happening. Overall, there are three problems with Alias #35, which is meant to fill with Preston:
- The alias has a condition on it that runs on the subject. Since it's a reference-based condition and the condition is evaluated before filling the alias, it will always evaluate as false. This condition should be removed outright, as it is redundant with a functional equivalent on the quest as a whole.
- The alias does not allow reserved references. Due to being an important character for the main story, Preston is frequently reserved and as such most quests that involve him (such as Minutemen radiant quests) allow him to be reserved when they need him in an alias.
- The alias is marked as a linked alias. This is mostly cosmetic, and seems to indicate that the quest originally grabbed the alias from a different quest. Since the alias uses a different fill type, linked flag is simply ignored.
As an additional note, the quest requires that preston has loaded 3D and that he is currently within 1500 units of the player. One or the other of these conditions should be enough, and the distance limit means that players who do not fast travel are much less likely to see this encounter than players who do since Preston frequently wanders outside that range while you travel.