PRJ98: Cannot Remove Constraint Date for a Task by Entering NA


In Microsoft Project 98, if you have assigned a constraint date for a task, you can not remove the constraint date by entering "NA." Entering NA in the Constraint Date field results in the following error message:

The value is not valid.

This is not a valid date, or is outside the range for dates, which is January 1, 1984 through December 31, 2049.

Type a date in the correct format: for example, 6/15/98 or June 15, 1998


A constraint date is required for any constraint types other than As Soon As Possible or As Late As Possible.


To remove a constraint date, change the constraint type to As Soon As Possible or As Late As Possible.


Microsoft has confirmed this to be a problem in the versions of Microsoft Project listed above.

Artikelnummer: 178395 – Letzte Überarbeitung: 22.01.2007 – Revision: 1