Can't create multicam clip in 10.0.7

I select angle A and B and create a new multicam clip from them but all that is in it is camera A. I use the automatic settings and it does a little 1 sec render thing. The little multicam icon shows in the top left corner but there is only one angle in the clip. I've rebooted, which I had to do 3 times just to import four clips, and still can't create a multicam clip.

Got it! Forgot to assign camera angles in Inspector.