Question : I have created UDF_CurrRate at Invoice detail and set a formula for Subtotal.
Formula : Subtotal = d_Qty *d_UDF_CurrRate * d_UnitPrice
But when I key in CurrRate = 2 and Unit Price = 100, the Unit Price will change to 200 and Subtotal become 400?
Possible Reason :
There is an option to calculate unit price from subtotal, which is enabled by default.
Solution :
If you set a formula for Subtotal, you must disable this option.
Go to Tools > Options > Invoicing > Document Control, uncheck Calculate Unit Price from Subtotal and click on OK.
Now, your formula should run correctly.