Microsoft KB Archive/95033

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Project: Leveled Task Incorrectly Scheduled with FNLT

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Q95033

BugList3.00 kbusage

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The information in this article applies to:


 * Microsoft Project for Windows, versions 3.0, 3.0a, 4.0
 * Microsoft Project for the Macintosh, version 3.0

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SYMPTOMS
If you are using leveling in Microsoft Project, a predecessor task may be incorrectly scheduled to occur after its successor task if the successor task has a Finish No Later Than (FNLT) constraint. This incorrect scheduling causes negative slack to be calculated and produces the following error message

Late date before scheduled date in task X...

where &quot;task X&quot; represents the task with the negative slack.

STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

Steps to Reproduce Behavior
Enter 3 tasks in a new project.

Assign the same resource to all three tasks:

 Select the tasks. From the Edit menu, choose Form. In the Resource box, enter the name of the resource and choose the OK button.

Select Task 1 and Task 2 and choose Link from the Edit menu.

With Task 2 selected, choose Form from the Edit menu. In the Constraint box, select the Finish No Later Than constraint. In the Date box (below the Constraint box) enter a date that is one working day later than the task's scheduled finish date.

Change the duration of Task 3 to 3d.

From the Options menu, choose Leveling. Choose the Manual button and set the Order option to Standard (make sure that the Automatically Remove Delay option is selected and that the Delay Only Within Slack option is cleared).

From the Options menu, choose Level Now.

Microsoft Project correctly schedules Task 2 to finish on the date specified by the Finish No Later Than constraint; however, Task 1 will be scheduled one working day later than the finish date of Task 2, and you will receive the following error message:

Late date before scheduled date in task 1. The task cannot be completed within the time allocated. Choose the Help button for suggestions on identifying and resolving this conflict.

Additional query words:

Keywords :

Issue type : kbbug

Technology :