i was able to receive ack to orchestration by using send n response logical port which i set bind layer physical port are 1 . solict response port with solicit response enable 2. one way receive port which is connect to response on logical port 3 then write the Ack to a file in hl7 formate all happening but some warning and error showing in my event log can you help me how can i remove following warning and error Event Type: Warning Event Source: BizTalk Accelerator for HL7 Event Category: None Event ID: 8455 Date: 7/10/2008 Time: 9:13:18 PM User: N/A Computer: BTAHL7 Description: "Submit Receive Location (URI)" must not be specified on native Solicit-Response Send Port (10.1.8.167:11000). This setting is ignored; the send port will operate as native Solicit-Response port. Unable to log message ""Submit Receive Location (URI)" mus..." to the event log due to exception: "Object reference not set to an instance of an object.". url:http://www.ureader.com/gp/1202-1.aspx