I am developing an Access 2007 "project" (.adp) as a front-end to data stored in a SQL-Server 2005 Express database.
In the Access application I have "Continuous" Form that lists records from a Table as rows.
In the "Form Footer" section I have 3 text box controls that count and sum the values from the displayed rows.
txtLineCount, data source : "=Count([ShopSales_UniqID])"
txtTotBalnQnty, data source : "=Sum([ShopSales_Qnty])"
txtTotBalnValue, data source : "=Sum([ShopSales_Value])"
These 3 text boxes display the expected values OK, but my problem arises when I try to added a 4th text box in the Form Footer.
txtTotCostValue, data source : "=Sum([ShopSales_Qnty] * [ShopSales_CostPrice])"
The "ShopSales_CostPrice" field is part of the underlying Table and is also displayed in each row. I want to display the total cost value in the Form Footer.
When I add this 4th text box I get "#Error" displayed in all 4 text boxes in the Form Footer.
I can understand there might be a problem with my "data source" syntax for my 4th box (or that "Continuous" Forms don't like such data manipulations) but why would it cause "#Error" to appear in the original 3 text boxes that work OK when the 4th box is removed?
Can anyone explain what is happening? Many thanks.