You will want to make sure the Local Supplier Catalog matches the Master Catalog Supplier.  It does not need to be an exact match but needs to be the same company.

Earlier we said you could process an update without changing anything in your ShopKart.  In this section check mark Update Supplier Contact Information, make sure all other check marks are unchecked, and in the Discontinued Products section choose Do Not Process Discontinued Items.   This will update the supplier contact information only.