I get an error on a simple custom flag to tak YES to whether a task / milestone is a deliverable.

Not applicable

I create a Flag that simply say = Flag[14]= Yes


Then created a text filed that says   IIf(Flag14="yes",True)


The summary task is showing Yes and the task/milestone is showing error.


I want to be able to flag the task/milestone as a yes if it is a deliverable.


I am working on a stand alone version of MS Project Professional 2016


I have created such formulas before and they worked  Please HELP


Please help. 



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