How To Fix SR440 - New serialization is not supported for RFC communication

SR440 - Overview

• Message type: E = Error

• Message class: SR - RFC utilities

• Message number: 440

• Message text: New serialization is not supported for RFC communication

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 SR440 - New serialization is not supported for RFC communication ?

  The SAP error message SR440, which states "New serialization is not supported for RFC communication," typically occurs in the context of Remote Function Call (RFC) communication between SAP systems. This error is related to the serialization of data being sent over RFC connections, particularly when there are compatibility issues between different versions of SAP systems or when certain configurations are not aligned.
  Causes:
  
  
  Version Mismatch: The error often arises when there is a mismatch between the versions of the SAP systems involved in the RFC communication. Newer versions may support features or serialization methods that older versions do not recognize.
  
  
  
  Configuration Issues: Incorrect configuration settings in the RFC destination or in the SAP system profiles can lead to serialization issues.
  
  
  Unsupported Data Types: If the data being sent includes types or structures that are not supported by the receiving system, it can trigger this error.
  
  
  Network Issues: Sometimes, network-related issues can cause serialization problems, especially