M Query Returns Error for Calculated column referencing null values of date column

[arikofather]

I have a calculalted M query column 

Receive and Close Date Flag

= 

if
([Actual Closed Date] >= #"Parameter Date Closed Start Date"
or
[Date Received] >= #"Parameter Date Received Start Date" and [Deal Status Display] = "Open")
then "True" else "False"

And two Parameter of same date value is set at

Note that the result column is showing Error whe the Actual Close Date is Null  

How can I fix this in my dax ?

[AndrewPF]

Please mark the solution as "Accepted" if this works for you.  Thanks. 

[AndrewPF]

If I type in the code exactly as described in my previous post, including the "try" at the beginning, and without the erroneous brackets, it works: 

[AndrewPF]

This is the code:

try if [Actual Date Closed] >= #"Parameter Date Closed Start Date" or [Date Received] >= #"Parameter Date Received Start Date" and [Deal Status Display] = "Open" then "True" else "False" otherwise null

It was Actual Date Closed, not Actual Closed Date, and there were some erroneous brackets

[arikofather]

It is not working for me.  Can you please update or test it out in the PBIX.   

As an FYI,  the cells showing as Error should display as False or True. 

[AndrewPF]

You need a "try" in front of the "if". 

The syntax is: 

try [THIS] otherwise [THAT]

where [THIS] is what you want to calculate i.e. your entire "IF" statement, and [THAT] is what you want to display if your calculation fails for any reason. 

[arikofather]

This gives Token eof Expected error.

[AndrewPF]

Use this:

try if([Actual Closed Date] >= #"Parameter Date Closed Start Date" or [Date Received] >= #"Parameter Date Received Start Date" and [Deal Status Display] = "Open") then "True" else "False" otherwise null

see also: 

Error handling - Power Query | Microsoft Learn

[arikofather]

I have a PBIX attached and Excel Data File.  

Date Flag Table.pbix

Date Flag Table.xlsx