I have not set a calendar at the project definition in level in the cprojects structure. I have set dates and durations for tasks and stages. Since I have not specified a calendar the calculated dates and durations consider all days including weekends. If I now specify a calendar which is defined to have 5 day work week, the calculated date and durations are not updated. Any ideas? I would like to avoid manually making changes to each and every task so that new calendard takes effect.