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When you first open a schedule in the CPM Gantt, CPM calculation is turned off. The CPM is displayed according to the options you selected in the Schedule document. This is the one overall critical path that drives the finish date of the schedule. Once CPM Calculation is enabled, the critical path is recalculated when you open the CPM Gantt. If you make any changes in the Collaborative Gantt, the dates will not be updated in Collaborative until you recalculate them in the CPM Gantt.
To enable CPM Calculation
Proliance calculates the critical path.