Custom Filter Error When Using Custom Field

I use a date field (i.e., date 4) that uses a formula to calculate the date for 1 month from today.


I then use that date 4field in the custom filter to filter for all tasks starts that are less than date 4.



I receive the error message, "The entry is not valid. The test value cannot be used with the field for the data you want to find or filter for."

How do I fix this?

How do you fix it? Don't use a date field. Instead use an extra number field for both your calculated value and to replicate your start date. For example use the CSng() function to convert your 1 month look-ahead date to a numeric value in the Number1 field. And, use another extra number field to capture and convert the Start field to a numeric value. Now filter on those two custom number fields.

Strange? You bet. Project 2010 has multiple little glitches that were not present in previous versions. For example, your approach works fine in Project 2007. This little glitch may or may not be addressed by a hotfix in the cumulative updates. I know it's not addressed by SP-1 because I have that installed. If you want to take a look at the issues handled by cumulative updates, go to,

Wish I had a better answer for you but at least you now have a workaround.


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Question Info

Last updated October 6, 2020 Views 824 Applies to: