If you see the following error in Mirth, it is caused by sending the wrong Letter in the MSH.11. MSH.11 and the site parameter listed under HL EDIT COMMON SERVER PARAMETERS in OpenVista must match.
ERROR-408: MLLP Connector error
ERROR MESSAGE: NACK sent from receiver: [Application Reject]
Processing ID Mismatch with Site Parameters
: MSH|^~\&|SISIADT FILER|OPENVISTA|PATCOM|0291|20130724160756-0600||ACK|09105195|P|2.2
MSA|AR|30723191553006227422ll|Processing ID Mismatch with Site Parameters
Here is an example of the MSH line of an ADT message where MSH.11 is P:
MSH|^~\&|PATCOM|0291|SISIADT FILER|OPENVISTA|20130723151553||ADT^A08|30723191553006227422ll|P|2.2|48|
Check the site parameter value in OpenVista to see if it is set to production or training:
Core Applications …
Device Management …
Menu Management …
Programmer Options …
Operations Management …
Spool Management …
Information Security Officer Menu …
Taskman Management …
User Management …
FM VA FileMan …
Application Utilities …
Capacity Planning …
HL7 Main Menu …
Test an option not in your menu
Select Systems Manager Menu Option: test an option not in your menu
Option entry to test: HL EDIT COMM SERVER PARAMETERS Site Parameter Edit
You can see in this example that it is configured to training:
The MSH.11 must send a T if this setting in OpenVista is set to training and if this setting in OpenVista is set to Production then the MSH.11 must send a P. This can be modified by using a Mirth Transform if need be.
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