Preventing PO Receipt when Standard Cost is Zero

Hello,

We're using ERP 9.0 and we've been asked if there's a way to prevent  a purchase order from being received if the item standard unit cost is zero.

As far as I've been able to see, the system will only stop receiving by returning a hard error if the standard cost record is missing in the F4105 file. But it returns a warning message if the standard unit cost is zero in F4105.

Is there a setup somewhere that I can use to stop receiving even if the standard cost is zero?

Regards