Add "COUNT" column in SSRS in place of details rows

Question

Apologies for this very newb-like question. I have some detail data that I want to group... I have added three group by columns (LOB, Event Classification, Assigned) to my table and want to add a third (Count) that counts the number of rows in the third (Assigned) group. At the moment I do this simply by adding a CountRows() column within the last (inner most) group. This is all I want to show. But I am forced to add a details column that I do not need (in this case I have "Amount"). Please see figure below:

Basically, I like what I have, except that I don't need that last "Amount" column. If I hide it, the row heights stay the same (i.e., their height is determined by the number of rows in the hidden column). I'm guessing I'm missing something pretty fundamental here. Any ideas?

Answer 1

From http://consulting.risualblogs.com/blog/2013/06/28/tablix-body-must-contain-at-least-one-column-ssrs/ I found:

1. Right click the last column, ‘Column Visibility’, ‘Hide’ 2: On the ‘Row Groups’ or ‘Column Groups’, right click the ‘Details’ grouping and press delete, but only delete the grouping, not the associated rows and just delete the data in the last column.