How To Fix BRF577 - Subexpression &2 used with expression &1 is buffered

SAP Error Message - Details

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 577

• Message text: Subexpression &2 used with expression &1 is buffered

What causes this issue?

Expression &v1& is <DS><DS:DE.BRF_XNO_BUFFERING>not buffered</>
</> but the subexpression used is buffered.

System Response

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

How to fix this error?

Check whether the subexpression used &V2& also needs to be calculated
anew for the new calculation of expression &v1&. With subexpression &v2&
, you can use either <ZK>Not Buffered</> or
<DS:DE.BRF_INVALIDATE>Invalidate</> as the setting for buffering.

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 BRF577 - Subexpression &2 used with expression &1 is buffered ?

  The SAP error message BRF577 indicates that there is an issue with the buffering of a subexpression in the Business Rule Framework (BRF). This error typically arises when a subexpression that is being used in a rule is set to be buffered, but the main expression is not configured to handle it properly.
  Cause:
  The error occurs due to the following reasons:
  
  Buffering Configuration: The subexpression is configured to be buffered, but the main expression does not support or is not set up to handle buffered subexpressions.
  Inconsistent Settings: There may be inconsistencies in the buffering settings between the main expression and the subexpression, leading to this error.
  
  Solution:
  To resolve the BRF577 error, you can take the following steps:
  
  
  Check Buffering Settings:
  
  Review the buffering settings of both the main expression and the subexpression. Ensure that they are consistent and compatible.
  If the main expression is not intended to be buffered, consider changing the buffering setting of the subexpression to match.
  
  
  
  Modify Expression Configuration:
  
  If the subexpression needs to be buffered, ensure that the main expression is also configured to support buffering.
  You may need to adjust the configuration of the expressions involved to ensure they work together correctly.
  
  
  
  Re-evaluate Rule Logic:
  
  Analyze the logic of the rules and expressions to determine if the use of buffering is necessary. Sometimes, simplifying the logic can help avoid such issues.
  
  
  
  Testing:
  
  After making changes, test the rules to ensure that the error is resolved and that the expected behavior is achieved.
  
  
  
  Related Information:
  
  BRF (Business Rule Framework): This is a framework in SAP that allows users to define and manage business rules in a centralized manner.
  Buffering: In the context of BRF, buffering is a performance optimization technique that allows frequently used expressions to be cached, reducing the need for repeated calculations.
  Documentation: Refer to the official SAP documentation for BRF for detailed information on configuring expressions and understanding buffering.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with a technical expert familiar with BRF configurations.