Date Format in Record Selection

Question

Hello,
I have a problem where the Crystal Report is not returning all the rows that meet the record selection criteria because I believe there is a problem with the date format.
My record selection criteria is:
( {EMPOS.POS_STARTC} <= {@EB_EDATE} and {EMPOS.POS_ENDD} >= {@EB_SDATE} ) or
    IsNull({EMPOS.POS_ENDD} )
where EB_EDATE and EB_SDATE are formula fields with the values Date(2011, 12, 31) and Date(2011, 01, 01) respectively which returns the format of DD/MM/YYYY used by the FinanceOne (F1) ERP application that we run the report from.  Both formula fields are overriden by the run parameters in the same date format in F1.
If I were to run the SQL below in a query tool like Toad, it returns a row where pos_startc is 1/01/2011 and pos_endd is null, that is not included in the report.
select * from empos where det_numbera = '01285'
                      and ( (pos_startc <= '20111231' and pos_endd >= '20110101') or pos_endd is null )
1. Why is Crystal Reports excluding this row when the date format is different?
2. How can I change the criteria (or format) to include the one of many other rows missing?

Answer 1

Hello,
Crystal Reports is now returning all rows where pos_endd is null in the database with the record selection criteria of:
{CHRIS_EmpSal.pos_endd} = date(0, 0, 0)
However, when I run it in Finance One, it doesn't like this date format   Is there another way to get both Crystal and Finance One (i.e., SQL Server DB) to recognise the same syntax for null dates?