I'm trying to create a variable combo box, using a query parameter through within an existing subform however I keep getting asked to input a Parameter Value when I follow the whole process in the parent form. And when I open the sub form on it's own the query I have created works as expected.
The subform I am working on already has an existing variable combo box which has a parameter relying on data input from the parent form, and I have managed to create this successfully. So I'm not sure why I am getting this error when I have the data it is asking for easily available?
Does anyone know why this is the case? I appreciate I'm being quite vague but not sure what detail I need to provide, so please don't hesitate to ask for me information.