Basic syntax question - using List.Dates function

Hi kerwin73 - The error message is attempting to explain that does not know where to find the columns used in your List.Dates function.  For example, [pse_Start_Date__c] is a column in the Object called #"Extracted Date1".  But Power Query does know this.  To help, I need to understand how many rows are included in the Table. 

If it is just one, then this might work.

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Extracted Date1" = Table.TransformColumns(Source,{{"pse__Start_Date__c", DateTime.Date, type date}, {"pse__End_Date__c", DateTime.Date, type date}}),
    Custom1 = List.Dates(
         List.Min( #"Extracted Date1"[pse__Start_Date__c]),
         Number.From ( 
             List.Min( #"Extracted Date1"[pse__End_Date__c] ) - 
                List.Min( #"Extracted Date1"[pse__Start_Date__c] ) + 1,
         #duration(1,0,0,0)
    )
in
    Custom1

 If there are multiple rows, then this would work.

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Extracted Date1" = Table.TransformColumns(Source,{{"pse__Start_Date__c", DateTime.Date, type date}, {"pse__End_Date__c", DateTime.Date, type date}}),
    Custom1 = Table.AddColumn( #"Extracted Date1" , "DateList", each
         List.Dates(
           [pse__Start_Date__c]),
           Number.From ( [pse__End_Date__c] - [pse__Start_Date__c] ) + 1,
           #duration(1,0,0,0) 
         )
    )
in
    Custom1