How To Fix RU520 - Pair formation: End message for start time &1 &2 is missing

SAP Error Message - Details

• Message type: E = Error

• Message class: RU - Messages for order completion confirmation

• Message number: 520

• Message text: Pair formation: End message for start time &1 &2 is missing

What causes this issue?

You have tried to create a finish-time event. The system ascertained
that for an existing start-time event on &V1& at &V2& there is a
missing finish- or interruption-time event.

How can this happen?

The following time events exist in the system:
Start processing 8:00
Partial finish processing 9:00
Start processing 13:00
If a "Finish processing" with 15:00 is to be created then this is not
permitted since a time event is missing between 9:00 and 13:00 which
represents the end of the time period that started at 8:00.

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?

First create the missing time event.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RU520 - Pair formation: End message for start time &1 &2 is missing ?

  The SAP error message RU520, which states "Pair formation: End message for start time &1 &2 is missing," typically occurs in the context of the SAP system's message processing, particularly in relation to the handling of messages in the SAP system's application logs or in the context of batch processing.
  Cause:
  The error indicates that the system is expecting a corresponding end message for a previously logged start message. This can happen due to several reasons:
  
  Missing End Message: The end message that should correspond to the start message was not generated or logged due to an error in processing.
  Processing Errors: There may have been an interruption or failure in the processing of the task that was supposed to generate the end message.
  Configuration Issues: There could be configuration issues in the message handling or logging settings in the SAP system.
  Data Inconsistencies: Inconsistent or corrupted data in the application logs or message processing tables.
  
  Solution:
  To resolve the RU520 error, you can take the following steps:
  
  
  Check Logs: Review the application logs or the relevant transaction logs to identify any errors or warnings that occurred around the time the start message was logged. This can provide insights into why the end message was not generated.
  
  
  Reprocess the Task: If the task that was supposed to generate the end message can be reprocessed, attempt to do so. This may involve rerunning a batch job or re-triggering a process.
  
  
  Check Configuration: Verify the configuration settings related to message processing in your SAP system. Ensure that all necessary settings are correctly configured.
  
  
  Data Consistency Check: Run consistency checks on the relevant tables to ensure that there are no data integrity issues. This may involve using transaction codes like SE11 or SE14 to check the database tables.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to message processing and error handling for any specific guidance related to this error.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the root cause, consider reaching out to SAP support for assistance. Provide them with the error message details and any relevant logs or screenshots.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLG1 (Application Log) to view logs and analyze the messages.
  SAP Notes: Search for SAP Notes related to RU520 or message processing errors in the SAP Support Portal for any known issues or patches.
  System Monitoring: Implement monitoring tools to keep track of message processing and catch errors early in the workflow.
  
  By following these steps, you should be able to diagnose and resolve the RU520 error in your SAP system.