How To Fix UC139 - Max. sender structure length of 4096 bytes was exceeded

SAP Error Message - Details

• Message type: E = Error

• Message class: UC - FI/CO Data transfer: errors during transfer

• Message number: 139

• Message text: Max. sender structure length of 4096 bytes was exceeded

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UC139 - Max. sender structure length of 4096 bytes was exceeded ?

  The SAP error message UC139, which states "Max. sender structure length of 4096 bytes was exceeded," typically occurs in the context of SAP's IDoc (Intermediate Document) processing or when dealing with data transfer between systems. This error indicates that the data structure being sent exceeds the maximum allowable size of 4096 bytes.
  Cause:
  
  
  Data Structure Size: The primary cause of this error is that the data structure being sent (such as an IDoc or a data packet) exceeds the maximum length of 4096 bytes. This can happen if:
  
  The data being sent contains too many fields or very large fields.
  There are concatenated strings or large binary data being included in the structure.
  
  
  
  Configuration Issues: Sometimes, the configuration of the IDoc or the data transfer settings may not be optimized for the data being processed.
  
  
  Solution:
  
  
  Review Data Structure: Check the structure of the data being sent. If possible, reduce the size of the data being sent by:
  
  Removing unnecessary fields.
  Trimming large text fields.
  Splitting the data into multiple smaller segments if applicable.
  
  
  
  Modify IDoc Structure: If you are working with custom IDocs, consider modifying the IDoc structure to accommodate larger data sizes. This may involve:
  
  Redefining the segments to allow for larger data fields.
  Creating additional segments to distribute the data across multiple IDocs.
  
  
  
  Check Configuration: Review the configuration settings for the IDoc or data transfer process. Ensure that the settings are appropriate for the data being processed.
  
  
  Use Compression: If applicable, consider using data compression techniques to reduce the size of the data being sent.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to IDoc processing and data transfer for any specific recommendations or limitations.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on handling large data structures.
  IDoc Monitoring: Use transaction WE02 or WE05 to monitor IDocs and identify which specific IDoc is causing the error.
  Performance Considerations: Be aware that increasing the size of data structures may have performance implications, so any changes should be tested thoroughly.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or development team for further analysis and assistance.