Populations remaining active when they shouldn't

[alanrogers]

I've got a complex model that seems to work, but in the output of dem.debug(), the final epoch has 6 active populations. Five of these should be empty and (in my view) should be inactive. I emptied them with proportion=1 inadd_mass_migration, which apparently does not set them inactive. Is there a command I can use to set them inactive?

By the way, the code runs, and there is no immigration into these populations, so I don't think they're doing any harm.

[jeromekelleher]

I think the issue is that deactivate doesn't happen when the populations are emptied by mass_migration, this only occurs when a population_split or other 1.0 specific events are called. I don't think there's a high-level API for setting populations as inactive, this is done in the C code.

However, I don't think it makes any real difference, as the active/inactive state machine is really just a user-feature to help with demographic modelling. If your model works as it is, then I'd leave well enough alone.