Comparing Dates in Set Analysis

[Skyblue]

Hi,

I am trying to compare a date field with two other date fields. Do you have an idea why it does not work?

SUM({$<[Confirm Date]={">=$(=[Vendor W End])"}, [Confirm Date]={"<=$(=[Hand Date])"}, [FY Delivery]={">=2018"}>}[Net Price])

Thanks in advance.

Best,