Hi Sam,
In EDITPA with FALevel=Default and autoGenerateFA=On
When you have these settings enabled, EDI module only validates the document at Envelope level and generates Functional ACK which comes as X12 Envelope in TN. So for these settings 997 schema may not be required.
In EDITPA with FALevel=TransactionSet and autoGenerateFA=On
When you have the FALevel as Transaction set, it validates the EDI transaction set and generates Functional ACK at transaction level which comes as X12 997 in TN. So you need to install the schema and TN document type in this case.
Hope this clears and have a good day.
Thanks,
Renuka.
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