Repeating Detail b section without effecting Details a and Details c in crystal report

Question

I have two temp-tables order and items. Single order may contain more than one item. My report is like below

Detail a
Order1   Order type
Detail b
Item1    itemname

When an order have more than two items then item section should repeat until the end of the items for that particular order like

Detail a
Order1   Order type
Detail b
Item1    itemname
Detail b
Item2   itemname
Detail b
Item3    itemname ……..

But I am getting as

Detail a
Order1   Order type
Detail b
Item1    itemname
Detail a
Order1   Order type
Detail b
Item2   itemname

I want to do it in section expert only without any stored procedure.

Answer 1

Use two reports in the report.

1. In detail A use first sub report
2. In detail B use second sub report.

Dont place any columns in the report only columns should be placed in sub report.