@Molly P : To answer your question:

Yes, there is a way to create a single analysis in Fusion Data Intelligence (formerly known as FAW) using data from multiple Subject Areas. However, you'll need someone with an administrator role to work with you to make this happen.

Theoretically, something to keep in mind is that in order for data to be included in the same analysis (like adding a Payment/Paid date column to the GL detail), it must come from the same Subject Area. This sounds contradictory to my sentence above, so I'll explain:

To address this, Fusion Data Intelligence has a feature called Configurable Account Analysis. This is an administrative step that essentially combines measures/attributes from multiple subject areas that may be referenced together often into what is essentially a new custom subject area. As I understand it (this is where I'll lean on my more technical colleagues for potential correction) - if every single measure & attribute offered out-of-the-box in FDI were all included in the same subject area, you'd likely encounter significant latency issues in generating your analysis since each measure and attribute is trying to relate itself to each other measure and attribute (If you try to do this in OTBI in the Fusion ERP Application - you'll experience this).

One final thing for you to check just to be sure you don't go through all that and still get blanks:

When you pull in metrics from the AP Payment Subject Area into a table by itself, data does populate, correct? It's just when you are pulling in the data from multiple Subject Areas that you encounter the blanks. If this is not the case, you have a separate issue at hand that needs to be addressed first.