@erictgrubaugh Is this still the best way to cancel SO via scripting? nlapiRequestURL('/app/accounting/transactions/salesordermanager.nl?type=cancel&id=' + nlapiGetRecordId());

It looks like the new 2018.2 macro/action API is designed for this type of thing, though from the release notes it may not support the Cancel button.

I will check it out. Thanks Michoel.