How To Fix UPS_C331 - Function Module &: Serialization Graph is Cyclical (Recursive)

SAP Error Message - Details

• Message type: E = Error

• Message class: UPS_C - ALE Object Services for Distribution Unit - Messages

• Message number: 331

• Message text: Function Module &: Serialization Graph is Cyclical (Recursive)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UPS_C331 - Function Module &: Serialization Graph is Cyclical (Recursive) ?

  The SAP error message UPS_C331, which indicates "Function Module &: Serialization Graph is Cyclical (Recursive)," typically arises in the context of the SAP Upgrade and Patch Management System. This error suggests that there is a cyclical dependency in the serialization graph, which means that the system has detected a loop in the dependencies of the function modules or objects being processed.
  Cause:
  
  Cyclical Dependencies: The most common cause of this error is that there are circular references in the function modules or objects that are being serialized. This can happen if one function module calls another in a way that creates a loop.
  Incorrect Configuration: Misconfiguration in the upgrade or patching process can lead to this issue, especially if the dependencies between objects are not correctly defined.
  Corrupted Objects: Sometimes, corrupted or improperly defined objects in the system can lead to cyclical references.
  
  Solution:
  
  Analyze Dependencies: Use transaction codes like SE80 (Object Navigator) or SE37 (Function Module) to analyze the dependencies of the function modules involved. Look for any circular references and resolve them.
  Check for Recursive Calls: Review the code of the function modules to identify any recursive calls that may be causing the cycle. If found, refactor the code to eliminate the recursion.
  Adjust Serialization: If you are using custom serialization logic, ensure that it is correctly implemented and does not create cycles.
  Upgrade/Support Packages: Ensure that you are on the latest support package or upgrade level for your SAP system, as this may resolve known issues related to serialization.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that resolve the issue.
  Consult SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide more specific guidance based on your system configuration and the context of the error.
  
  Related Information:
  
  Transaction Codes: SE80 (Object Navigator), SE37 (Function Module), ST22 (Dump Analysis), SM21 (System Log).
  SAP Notes: Always check for relevant SAP Notes that may provide fixes or workarounds for this error.
  Documentation: Review SAP documentation related to function modules and serialization to better understand how to manage dependencies.
  
  By following these steps, you should be able to identify and resolve the cyclical dependency causing the UPS_C331 error in your SAP system.