I have 3 datasets in my project. I am trying to create an expression in a standalone textbox that reports "Error Found!" if the field.value is populated and "No Errors" if the field.value is blank.
=SUM(IIF(Fields!Account.Value = "","No Errors","Errors Found!"),"Account")
This is kicking back a "Report item expressions can only refer to fields within the current dataset scope or, if inside an aggregate, the specified dataset scope." error.
To avoid issues with multiple datasets, I added the SUM and the "Account" to reference the correct dataset.
If I were to replace my TRUE/FALSE with "1,0", the expression works.