Validation of the value of an Enum field

[Juan_Gutierrez]

I am trying to do something very simple which is to detect what value is selected in an enum field to be able to do a mathematical operation based on that data but I get an error (you can see it in the image). How do you work this type of operation with these fields?

Many thanks for your help

The enum values are 3 Expense, income and transfer

[AleksiAlkio]

You are trying to compare text value with a list. It sounds your column type is an EnumList rather than Enum. If you want to keep EnumList, you need to use IF(IN("Gasto",[Tipo de operacion]),...)