On Field Update Invoke 1

Use this user property to call a service method to set the system allocation for the child line items of the appropriate package.

Property	Description/Value
Value	"TNT Use System Alloc Flag", "TNT SHM Invoice Order Item", "UseSysAlloc", "IIf([TNT Use System Alloc Flag], ""Y"", ""N"")"
Parent Object Type	TNT SHM Invoice Order Item business component
Usage	Calls the System Allocation service method, if the value of the TNT Use System Alloc Flag field changes.