How To Fix BRF412 - You are not permitted to output multiple identical messages

SAP Error Message - Details

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 412

• Message text: You are not permitted to output multiple identical messages

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

You tried to output two identical messages.
Two messages are regarded as being identical if the message number and
the message class match. For example, messages E122(BRF) and W122(BRF)
in the sense of the action <ZK>Output Message</> (0MS001) are identical.

How to fix this error?

Choose one of the two messages.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BRF412 - You are not permitted to output multiple identical messages ?

  The SAP error message BRF412 ("You are not permitted to output multiple identical messages") typically occurs in the context of Business Rule Framework (BRF) applications when there is an attempt to output the same message multiple times during the execution of a rule or decision table. This is a safeguard to prevent redundancy in user notifications or logs.
  Cause:
  
  Duplicate Message Output: The primary cause of this error is that the BRF logic is trying to output the same message more than once in a single execution context. This can happen if the rules are designed in such a way that they trigger the same message under certain conditions multiple times.
  Rule Configuration: The configuration of the rules or decision tables may not be set up correctly, leading to the same message being evaluated and triggered multiple times.
  Looping Logic: There may be a loop or recursive logic in the rules that inadvertently causes the same message to be generated multiple times.
  
  Solution:
  
  Review Rule Logic: Check the rules and decision tables to ensure that they are not configured to output the same message multiple times. You may need to adjust the conditions under which messages are triggered.
  Use Unique Messages: If the same message needs to be displayed for different conditions, consider modifying the message text slightly to make them unique, or aggregate the messages into a single output.
  Implement Message Control: Introduce logic to control message output, such as flags or counters, to ensure that a message is only output once per execution context.
  Debugging: Use debugging tools to trace the execution of the rules and identify where the duplicate message output is occurring. This can help pinpoint the exact condition or rule causing the issue.
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance on BRF configurations and best practices.
  
  Related Information:
  
  BRF+ Documentation: SAP provides extensive documentation on the Business Rule Framework, which can be helpful in understanding how to configure rules and manage message outputs.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches or updates that could resolve the issue.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the BRF412 error and implement a solution to prevent it from occurring in the future.