ASN Number field on SNC Web Screen

Hi,

We have the requirement to make ASN Number field as Grayed out on SNC Web Screen. We are using SNC Internal Number range to generate ASN Numbers and do not want Supplier to enter any number manually. System is allowing to enter the ASN number manully without any error message which is causing issues in subsequent processes.

Is there a way to gray out the ASN Number or configure error message when user enters the number manually?

Thanks,

Pankaj