?!?!?!?!?!
I've never had a problem colonising with no cargo. You just get a domed colony with population zro, and a corresponding build rate of zero. All you need to do thn (although it is a pain in the arse) is fly a cargo ship out there with some ppl on board.
you're right though, you should always check your colonisers for population before sending them out in to the unknown. It's easy to forget.
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