How To Fix SRT_CORE206 - Unequal number of messages and bgRFC units

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_CORE - Nachrichtenklasse für SOAP Runtime

• Message number: 206

• Message text: Unequal number of messages and bgRFC units

What causes this issue?

In some releases without a necessary Support Package there was no
relation between a Web Service message and the bgRFC unit ID. Therefore,
it is not available to determine which message is belonging to which
bgRFC unit.
For these "old" messages only a check of number of bgRFC units and
according messages stored as incomplete in XI persistency is necessary.
This kind of checks can only be doen on the provider side because on
consumer side a bgRFC unit can contain more than one Web Service
message.
This check is now failed for the current message.
This might happen if the bgRFC queue is deleted manually from within the
bgRFC Monitor. Therefore, never delete a bgRFC unit or queue from within
bgRFC Monitor.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

All messages of the current sequence and bgRFC queue are now in an
inconsistent state and it is not clear whether some of them are already
delivered.
Following steps are necessary to clean up this situation:
Look at the message payload by clicking the "Message State" to run the
XI Message Monitor.
Based on the payload contact the responsible Web Service application and
ask for checking whether you can terminate the whole sequence and if
necessary delete all units of the affected bgRFC queue by using the
Sequence Monitor and the bgRFC Monitor.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SRT_CORE206 - Unequal number of messages and bgRFC units ?

  The SAP error message SRT_CORE206 indicates that there is an unequal number of messages and background RFC (bgRFC) units in the context of SAP's integration framework, particularly when dealing with the SAP Process Integration (PI) or SAP Process Orchestration (PO) scenarios. This error typically arises when there is a mismatch in the expected number of messages being processed and the number of bgRFC units that are available or being utilized.
  Cause:
  
  Message Processing Issues: The error can occur if messages are not being processed correctly, leading to a situation where the number of messages queued does not match the number of bgRFC units that are supposed to handle them.
  Configuration Errors: Incorrect configuration of the bgRFC settings or the integration scenario can lead to this mismatch.
  System Performance: If the system is under heavy load or if there are performance issues, it may not be able to process messages in a timely manner, causing discrepancies.
  Network Issues: Problems with network connectivity can also lead to messages being lost or not processed correctly.
  
  Solution:
  
  Check bgRFC Configuration: Ensure that the bgRFC configuration is set up correctly. This includes checking the number of bgRFC units and ensuring they are sufficient for the volume of messages being processed.
  Monitor Message Processing: Use transaction codes like SLG1 (Application Log) or SRT_MONI (for monitoring the service) to check for any errors or warnings related to message processing.
  Review System Performance: Analyze system performance metrics to identify any bottlenecks. If the system is under heavy load, consider scaling resources or optimizing the processing logic.
  Reprocess Messages: If there are messages stuck in the queue, you may need to manually reprocess them. This can often be done through the relevant monitoring transactions.
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as there may be bug fixes related to bgRFC processing in newer versions.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP Notes often provide detailed troubleshooting steps and solutions for known issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SRT_MONI for monitoring, SLG1 for application logs, and SM58 for monitoring asynchronous RFC calls.
  SAP Documentation: Review the official SAP documentation for bgRFC and PI/PO for best practices and configuration guidelines.
  Community Forums: Engage with SAP community forums or support channels for additional insights and shared experiences from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the SRT_CORE206 error effectively. If the issue persists, consider reaching out to SAP support for further assistance.