One frustration I have with the the SAI Campaign is assigning mining missions. I create the mission, activate the forces, load mines and then when I advance the turn it says I have activated ships but not a point objective. I try to activate de-activate, cancel objective, activate objective over and over again and still this message. I know I have sometimes gotten past it, but there is probably an EXACT order of doing this that I am forgetting or missing. Really irritating! What is the step by step procedure for this? Thanks!
Just click "yes" on the "are you sure" dialog for not having a point-bearing objective. Mining objectives don't give victory points for completion, so that dialog will appear if you haven't selected any other objectives that do give points, but it's an "are you sure?", not an error.