Hello Jamie,
Left outer join is okay with the way the join as discuss earlier.
I finally got data back.
The issue is, when using FM (function tables). You need the left table (not function table).
which feed the key field to the function in order it return data to the detail report.
And also link key field must be from the table itself in the Select Expert -- record.
if you are link from the variable in the Select Expert, it would not return any data at all.
This issue is solved.
Thank you for helping me on this issue.
-Nghiem