How To Fix B1420 - Selected function not implemented for message type &

B1420 - Overview

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 420

• Message text: Selected function not implemented for message type &

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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B1420 - Details

• The SAP error message B1420, which states "Selected function not implemented for message type &," typically occurs in the context of the SAP IDoc (Intermediate Document) processing. This error indicates that the system is trying to process a message type for which the corresponding function has not been implemented or is not available in the system.
  
  Cause:
  
  Missing Function Module: The function module that is supposed to handle the specific message type is not implemented or is missing.
  Incorrect Configuration: The message type may not be correctly configured in the IDoc processing settings.
  Custom Development: If there is custom development involved, the function module may not have been created or activated.
  Version Mismatch: There may be a version mismatch between the sender and receiver systems, leading to unsupported message types.
  
  
  Solution:
  
  
  Check Function Module: Verify if the function module associated with the message type is implemented. You can do this by checking the relevant message type in