DAX: Compare Date Hierarchy value with regular datetime

[Anonymous]

In a Measure, doing a straight comparison between a datetime or date and a Date Hierarchy results in an error:

"A single value for column 'Created ON' in table 'Table' cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single result."

Created On is a Hierarchy. 

How do you compare the date value of a Date hierarchy to a date time or just date value in DAX?