Cannot Render Multiple Columns in Subreports
|Progress® Telerik® Reporting
|Q2 2012 and later
|WinForms, WPF, ASP.NET
A multi-column report shows fine in preview, but when used as a subreport, it shows as a one-column report only.
The multi-column functionality is intended to be used only in the main report because all report sections (excluding
Page sections) are rendered in a column-wise layout.
This issue occurs by design and it is not intended for multi-column reports to be used as subreports.
As a workaround, you may try the approach from the KB How to Create a Multi-Column Report - Across the Page and Then Down in the subreport.