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If you use Microsoft Project Professional 2002 with Microsoft Project Server, the task durations may be calculated incorrectly when both of the following conditions are true:
You have an Enterprise Global Calendar that has default non-working times scheduled.
You apply a new project calendar.
Note Examples of default non-working times are Saturdays and Sundays.
This problem occurs when the new project calendar uses a Copy of Standard calendar that has non-working times defined that enclose the default non-working period.
Service Pack Information
This problem is corrected in Project 2002 Service Pack 1.
To resolve this problem, obtain the latest service pack for Project 2002. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
867829 How to obtain the latest Microsoft Project 2002 service pack
How to Obtain the Hotfix
This issue is fixed in the Microsoft Project 2002 Hotfix Package dated October 6, 2003. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
829347 Microsoft Project 2002 Hotfix Package: October 6, 2003
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article. This problem was first corrected in Project 2002 Service Pack 1.