I did a clean (re) install of Toast 11.2. Toast crashed when I changed some of the preferences. I am doing data discs in PC and Mac format. I restarted Toast and now it seems to be working fine. I am not sure if or what was corrupt. But with the install of 11.2 it seems to have stabilized. I have many more discs to do and will update my post if I start to have problems again. Thanks for your response.