Would someone be able to tell me what the following message wants me to do. Optimization Required A selection region was not detected. Playback will start when the entire sequence optimization completes. This may take some time, continue with optimization yes/ no I have had the sequence working but only when I say yes to the above question but....... it only works after loading the file. Also while I am trying to find the fault some lights come on and stay on and they do not go out. Any suggestions?