A "tablix" is a data region that can be configured as a table, a list, or a matrix. I have been making the assumption that your data expressions were inside...

Are all the text boxes inside a List? The tablix itself is not visible from the screenshot.

These are errors of "context," meaning that the formula may be correct, but is not working in the particular context where you have put it in the report design. Fixing...

The First() aggregate function should is not necessary; the scope should be such that there is only one value for the Gender field.

Also, the first parameter is always the foreign...

Add a secondary dataset to the report design that pulls the values from the lookup table. In the tablix, use the Lookup() function to find the value corresponding to whatever...

If you don't necessarily want the disclaimer to print at the bottom of the last page, you can put the disclaimer is a text box in the body of the...

Sometimes the order of operations can have a significant effect on the way SSRS interprets the results of nested functions. It would probably be best to put the CDec function...

I suspect the problem can be resolved by applying a "scope" to one or both of your aggregate functions. It is difficult to tell for sure because of the lack...

Here is one option. I used a special qualifier of the CONVERT() function to get the correct binary value out of the VARCHAR value in the first table.

with

Table1 as

...

Assuming you are going the subreport method, when you create the subreport (which is developed first as a standalone report before being added as a subreport to the final design),...

If the datasets are populated by basic queries, it would be easiest to re-write the queries into one uniform set of results, probably through the use of UNION to "stack"...

Without a bit more about what columns are in the datasets it is difficult to have confidence that one particular suggestion is the best approach. My first thought is to...

Correlated subqueries can exist in the SELECT clause and the WHERE clause, and as you have shown in the predicate of a CROSS APPLY clause, but not as a simple...

Group the dataset by Ptid and then use a combination of MAX() and CASE to return one value for each column, for example:

SELECT

Ptid,

BP = MAX(CASE WHEN Test =...

Rather than a subreport, I would approach this as a click-through report with the secondary report using the same dataset as the matrix but filtered by parameters to the specific...