With mods off or on... I typically get a crash after forming a commonwealth, sometimes prior to starting a new turn, sometimes after. Maximum amount of turns I've gotten to after forming a commonwealth is two.

My debug file said this at the end of last time...

Debug Message:  Tech Hyperdrive Specialization percent 200

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/????????????

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/????????????

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/??

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/??

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/????????????

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/

Debug Message:  SoundSystem Error: MilesEvent: An asset requested by an event was not found in memory. : GC3_SFX_Bank/??

Any idea what would cause this?