How To Fix SRT_CORE202 - Invalid Sequence ID in Sequence Layer

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_CORE - Nachrichtenklasse für SOAP Runtime

• Message number: 202

• Message text: Invalid Sequence ID in Sequence Layer

What causes this issue?

The message stored in the XI persistency contains a logical sequence ID
which is managed by the Sequence Manager but this sequence ID is no
longer invalid.

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?

As the message belonging to this sequence is now in a inconsistent state
and it is not clear whether it is already delivered, following steps are
necessary:
Look at the message payload by clicking the "Message State" or
"Persistency ID" to run the XI Message Monitor.
Based on the payload contact the responsible Web Service application and
ask for checking whether you can cancel this message.
To cancel one or more messages just mark the according entries and click
"Cancel Messages".

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_CORE202 - Invalid Sequence ID in Sequence Layer ?

  The SAP error message SRT_CORE202: Invalid Sequence ID in Sequence Layer typically occurs in the context of SAP's web services and integration scenarios, particularly when using the SAP Process Integration (PI) or SAP Process Orchestration (PO) systems. This error indicates that there is an issue with the sequence ID used in the message processing, which is crucial for maintaining the order and integrity of messages in a sequence.
  Causes:
  
  Invalid Sequence ID: The sequence ID being used in the message does not match any expected or valid sequence IDs in the system.
  Message Corruption: The message may have been altered or corrupted during transmission, leading to an invalid sequence ID.
  Configuration Issues: There may be misconfigurations in the service interfaces or the integration scenarios that lead to the generation of invalid sequence IDs.
  Concurrency Issues: If multiple instances of a service are trying to process messages simultaneously, it may lead to conflicts with sequence IDs.
  Timeouts: If a message takes too long to process, it may lead to a situation where the sequence ID is no longer valid.
  
  Solutions:
  
  Check Sequence Configuration: Verify the configuration of the sequence in the SAP PI/PO system. Ensure that the sequence IDs are correctly defined and that the service interfaces are properly set up.
  Message Monitoring: Use the SAP message monitoring tools (like the Message Monitoring in the Integration Engine) to check the status of the messages and identify any that may have failed due to invalid sequence IDs.
  Reprocess Messages: If you identify messages with invalid sequence IDs, you may need to reprocess them. This can often be done through the SAP PI/PO monitoring tools.
  Review Logs: Check the application logs (transaction SLG1) for more detailed error messages that can provide insights into why the sequence ID is invalid.
  Adjust Timeout Settings: If timeouts are causing issues, consider adjusting the timeout settings for the relevant services to ensure that messages are processed in a timely manner.
  Consult Documentation: Review SAP documentation or notes related to the specific version of SAP you are using, as there may be known issues or patches available.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Integration Patterns: Familiarize yourself with the integration patterns and best practices for using SAP PI/PO, as understanding these can help prevent issues related to sequence IDs.
  
  If the problem persists after trying the above solutions, it may be necessary to involve SAP support for further assistance.