I am trying to add a calculated column to a report that calculates the number of workdays between the completion dates of two milestones. The current configuration is below.

[TerryGi]

valueexpression=WEEKDAYDIFF({milestone}.{name}="Label Project Start Up",actualCompletionDate),({milestone}.{name}="Release Final Files",actualCompletionDate)

valueformat=HTML

Has anyon had any luch with anything similar to this?