Hi! I use Biztalk 2006 R2 and HL7 Accelerator 2.0. I need to map a ORU^R01 message to a canonical format because I can receive different ORU from different labo. So I put a map in a receive port. The port is two way to send back accept ack. When there is no errors in the message, the ack is generated by the pipeline and send back correctly. But If there are parsing errors, then no ack is generated because there is an error in the message and the mapping is not working. I made a test and if I remove the map from the port, then the ACK is generated even if there are parsing errors in the message. Does anyone know a workaround for this problem or maybe a hotfix is available ? Thanks a lot Benoit