Expression.Error: We cannot convert the value null to type Logical. Details: Value= Type=[Ty

[Marcegon]

Hi! I am new to the community and still learning Power BI.  Could someone help me fix this error? 

I get null and error (see screenshot and rule below).  Any help would be appreciated.  Thank you!

if [#"room nights"] = null and ([Number rooms per night]) >= 19
and Duration.Days(Date.From(DateTime.LocalNow())-Date.From([Start Date])) <= 14
and [#"format"] <> "Virtual"
then "missing"
else [#"room nights"]

[PijushRoy · Accepted solution]

Hi @Marcegon 

To make it simple, please create a separate custom column for. 
Duration.Days(Date.From(DateTime.LocalNow())-Date.From([Start Date]))

Please share a screenshot of your data or paste your data here (after removing sensitive information ) & full logic you want to implement.

then use the column in your final custom column.

Please let me know