Tabela 0179 - Response Level

Item#	Descrição
NE	Never. No application-level response needed
ER	Error/Reject conditions only. Only MFA segments denoting errors must be returned via the application-level acknowledgment for this message
AL	Always. All MFA segments (whether denoting errors or not) must be returned via the application-level acknowledgment message
SU	Success. Only MFA segments denoting success must be returned via the application-level acknowledgment for this message

Documentação Interoperabilidade SPMS