I figured out a small work-around for passing a single value, in case anyone is still around. The trick is to use a Reference Field.
On the Main tab, I have 2 tables.
Table1: “Top 20 Products” with multiple columns and ranked by production quantity.
Table 2: “Selected Product” with just one column [Product Name]. Change the column header to the field [Product Name]. When there’s more than one product the header shows “#MULTIVALUE”. When there is only 1 product in the table, the header shows the Product Name.
In Table 1: Define an Element Link on [Product Name] for Table 2 “Selected Product”. Clicking on a row in Table 1 filters Table 2 to a single value. Clicking on a column header in Table 1 makes Table 2 very long.
On Table 2: Assign a Reference Field on the header. [Selected Product Reference]
Hide Table 2.
Now on the Main tab, place a Cell that is a picture of a button with the text “Show Production Details”. (hidden when no product is selected).
Add Intra-Document link to the button cell to the report tab for Production History.
Report tab Production History: Table of “Production Lots” with details.
Define Variable [Show Lots] = If [Product Name] = [Selected Product Reference] then “Y” else “N”
Filter on table Production Lots: [Show Lots] = “Y”
Hide the Production Lots table when empty.
Behind that table, put a big cell that says Go Back to Main tab to select a Product. Add an Intra -Document link to that cell, taking them back to the Main tab. When the table is hidden, the button is visible. When a Product is selected, table is visible, and the button is behind the table.
If anyone has any solution that is slicker, I’d love to hear it.
I’m really gonna miss this site! 
Seagrass (BOB member since 2014-11-18)