How To Fix SY503 - Max. number of "Separate Units" in a tRFC LUW exceeded (max. 10000)

SY503 - Overview

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 503

• Message text: Max. number of "Separate Units" in a tRFC LUW exceeded (max. 10000)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY503 - Max. number of "Separate Units" in a tRFC LUW exceeded (max. 10000) ?

  The SAP error message SY503 indicates that the maximum number of "Separate Units" in a transactional Remote Function Call (tRFC) Logical Unit of Work (LUW) has been exceeded. This typically occurs when a large number of separate units (or messages) are being processed in a single tRFC call, surpassing the system's limit of 10,000 units.
  
  Cause:
  
  High Volume of Data: The error is often caused by attempting to send or process a very high volume of data in a single tRFC call, which exceeds the limit set by the SAP system.
  
  Configuration Issues: The system may be configured to handle a certain number of separate units, and if the application logic is not optimized, it can lead to this error.
  Batch Processing: If a batch job is designed to process too many records at once without proper segmentation, it can trigger this error.
  
  
  Solution:
  
  
  Reduce the Number of Separate Units: 
  
  Modify the application logic to break