On Field Update Set 47

Use this user property to check that at any time either the Discount Amount field or the Discount Percentage field has a value, but not both fields.

Property	Description/Value
Value	"Discount Amount", "Discount Percent", "IIf ([Discount Amount] IS NOT NULL, """", [Discount Percent])"
Parent Object Type	TNT SHM Quote Item business component
Usage	Checks that at any time either the Discount Amount field or the Discount Percentage field has a value, but not both fields.