How to get AI EMpire to Surrender !?

[RiTz21]

Greetings !

I am playing this TDM-ModPack game and I've almost wiped all of an AI's Race except for one tiny planet with 19M population left, and my Fleet in Orbit.

Since that race has ICE colonization, I'd like it to SURRENDER instead of just wiping them out and missing the opportunity to get that technology. But alas, when I ask it to surrender, it always tells me it's too close to victory to surrender.. yeah right...

Any suggestions HOW I could sway those poor souls into surrendering !? I am not at war with them, but their mood is "murderous".

THANKS !!

RiTz