100% reproducible CTD at specific coordinates for months [grammar.pggmod]

[hobanagerik]

@tamalien

However, I am not sure that this will necessarily fix things for those who are having ctd with the grammar.pggmod error.

If I remember right that was related to Blackshark AI, and is an autogen error.

One workaround was to lower the quality of the autogen buildings in the graphics options. Going from Ultra to Low/Medium would work.