I once "won" SC2K when all my launch arcologies took off. However, I was busy fixing the city's plumbing (the buildings are hidden so you can deal with the pipe

I once "won" SC2K when all my launch arcologies took off. However, I was busy fixing the city's plumbing (the buildings are hidden so you can deal with the pipework) and I missed it. I tried switching mode but it wouldn't let me until it finished.