I've reached level 16, where the retirement option has become available. However, after I retired one of my sims, the option of retirement has been blocked for my sims's husband who also has maxed out traits and has the 'ready to retire' option. But it still won't let me retire him. I have also moved out all of their adult children, so there should be enough room in the household, but it still doesn't work. Is this a glitch/bug? If not, how can I fix it?
You have to have an available sim to play when you retire another sim. So you basically have to replace the sim you retire.