FHS|^~\&|SENDER|SENDFAC|RECEIVER|RECFAC|20260815090000
BHS|^~\&|SENDER|SENDFAC|RECEIVER|RECFAC|20260815090000
MSH|^~\&|SENDER|SENDFAC|RECEIVER|RECFAC|20260815090000||ACK^A08^ACK|B1|P|2.5
MSA|AA|MSG00001
MSH|^~\&|SENDER|SENDFAC|RECEIVER|RECFAC|20260815090005||ACK^A08^ACK|B2|P|2.5
MSA|AE|MSG00002|Unknown patient identifier
ERR||PID^1^3|101^Required field missing^HL70357|E
BTS|2
FTS|1