Anomalous Population Loss (Result of Immigration/Merging?)

[Freebot]

To quote myself in a thread in general discussion:

I've got a repeatable incident that strikes craftsmen in Montevideo on July 30, 1886. On July 29, 1886, there are a total of 927,899 craftsmen in the province. On July 30, 1886, there are 911,790. The trigger seems to be the immigration of 675 craftsmen from Vinchina (wherever that is). Some pops are decreased to 50,000. Others are increased to 50,000. One is even increased to 100,000. This phenomon probably accounts for the misconception that all of the population is distributed to other POPs. Careful counting, however, reveals a deficit. This deficit is also reflected in a national and provincial population total decrease. However, (927,899 - 911,790) * 4 = 64,436 while national population decreased by 161,000. Why the discrepancy? Maybe this is happening at the same time elsewhere in the country.

 

[Freebot]

Further testing suggests that it is triggered solely by internal migration within a country. I can eliminate the problem entirely if I am diligent at employing any unemployed pops on the first of every month.

The July 30, 1886 incident is 100% reproducible provided that the player does nothing. I'd be happy to post the savegame if given the appropriate forum permissions or e-mail the savegame to interested parties.

 

[King]

Are you 100% certain that the unemployed pops are not moving abroad to find work? Also if the POPs are not getting thier life goods (and people without jobs do tend to strugle a bit compared to ordinary POPs) people tend to die.

 

[Freebot]

Are you 100% certain that the unemployed pops are not moving abroad to find work? Also if the POPs are not getting thier life goods (and people without jobs do tend to strugle a bit compared to ordinary POPs) people tend to die.

My pops are swimming in money. Yes, I did look at growth rates and immigration. Both are fine. Run my game briefly, and you will see that my country is an immigrant utopia complete with democratic reforms, unemployment subsidies, etc., etc. Note that the discontinuity does NOT occur at the transition between months (when natural growth and decrease would occur). All pops in the victim province are employed.

If the player does nothing in my savegame, then a craftsman pop in my province of Vinchina will become unemployed. Looking for work, 650 craftsmen from that pop will split off and seek work in my bustling capital of Montevideo on July 30, 1886. This apparently causes much controversy and gnashing of teeth among the craftsmen of Montevideo, and thousands of them spontaneously commit suicide.

 

[Freebot]

I am now hosting the save file at a third party site.

June_10_1886

I can produce other instances of this bug upon request.

More discussion about this issue can be found in this thread.

Of particular interest:

That is triggered by immigration to the province and the immigrants merging with the locals. Pops above 50k get truncated to 50k, with the excess being added up. If the sum of all the excess is over 100k, the remainder disappears.

My experience would amend this statement as follows:

That is triggered by migration within a country to the province and the migrants merging with the locals. Pops above 50k get truncated to 50k, with the excess being added up. If the sum of all the excess is over 100k, the remainder disappears.

 

[King]

Ok I see what you mean. I'll secure a rulling on this.

 

[Freebot]

I forgot to mention that I observed using the recent patch, 1.4. Though other people imply that this occured in earlier versions as well.

 

[King]

No problem, that's the version I used to duplicate it.