Hi Scott,

You'll probably need to copy over, from the base schema, all <SegmentStructure> that reference the custom code table, and all <MessageStructure> that reference those segments, and all <MessageType> that reference those message structures. Please give it a try and let us know how it goes. In case it's still not working as expected, please post the full custom schema and the base schema for further discussion, or contact WRC for further assistance.

Best Wishes,