Not sure about your situation, but one of the main issues is that factions are limited to 6 "heirs" (sons or brothers of the faction leader). So if your kings has 6 brothers taking up the spots, he will be unable to birth a male heir. In this case, the most useless of the brothers needs to be killed off quickly, either through assassination or a suicidal attack. Once a son takes over as king, the brothers become royal uncles and no longer count towards the 6 heir limit.

You can also have kings that just don't produce (check their vices), or get killed off before sons come of age. You can use the .unfreeze. cheat to get a male born, but the king will need to stay alive for 16 years to allow the son to come of age.

Welcome to the Org!