I am building an SSRS 2005 report using BIDS. My report filters on date. When the selected date returns no data rows the report is blank, just the title is displayed, no tab
NoRowsMessage and build your own conditional empty rowOne problem (or feature if that's what you want) with NoRowsMessage is that it'll literally replace the entire table with just a plain old message string.
Which provides a relatively counter-intuitive end user experience in my opinion. Normally when no data is found by a system, we'd like to know something about what data was being looked for and what it would have looked like.
Instead, based off how to keep the structure of the Tablix when there is no data to show, you can do the following:
Insert New Header Row, outside the group and above the details record.

Right click on the side of the new row and Set Row Visibility

Set Visibility to the following expression which will count the rows inside the current Tablix and only set Visibility to True if there is no data.
=CountRows() > 0

Optionally, merge the cells and add your own message or just display an empty row

