Here is where we get a message that there is a problem/limit with source data files, and when we query on the error, we get this message -
Check for nested equations.Check your workbook for custom calculations that contain other calculations that reference a secondary data source, or custom calculations that reference a calculation in the primary data source that references a secondary data source. If these types of calculations are being used in your workbook, modify the calculation so it does not use nested equations.
We are, of course,calculating a variable with a previously calculated variable - but I am not clear on why that presents a problem. Please advise.