I have this mapping data flow, with two branches from &amp;#39;RemoveHdlColumns&amp;#39;.
When I run this the rows from MergingInput is only loaded through the bottom branch.
All the rows are loaded for the &amp;#39;Select2&amp;#39; transformation, but NO rows hits the &amp;#39;Select1&amp;#39; transformation (or HashAllColumns or ChangedRows).
Select1 and Select2 are identical, without any expression - just set to auto mapping.
Why is this?