I've made an Expression Column called 'X' and filled it with data (numbers)
There's something else going on here. This is the second time you've indicated you're entering data into an
Expression Column. That's not
normally possible, and certainly not what it's intended for. It's meant to display a
calculated result. Under at least one circumstance, however, it is possible to edit values in an expression column. That's when the expression simply refers to one other field. In that case, the result can be edited,
and the result is to change the value of the source field.So I wonder if your
Expression Column 'X' is simply referring to some other field 'W'. If so, that's where your data is. But if that's the case, 'X' nor
Expression Field 'Y' are serving any purpose. It would be helpful to know exactly what the expression is, so we might understand what's going on.