Hi Julie, thanks for asking. To get the planning wiz make appear I just increase the duration time until it's this much that it hits a constraint ("must finish on"). Then he planning wiz pops up like I desire and it'a supposed to do. But after, when I do the same a secobd or mor time, it let the wrong duration time just work false and is ignoring the set time constraint. In my opinion this is a big blunder of ms-project and so it's not trustworthy. I tried to find the root cause and I think int' somewhere hidden in the windows registry. I was able to fix the problem on my laptop at home but it fails at work at the computer though I did there the same changes. If you might help me I would be very gateful! Thanks again in advance! Best regards, Hans ... from Steinwiesen, Germany