How To Fix BRF155 - Expression &1 is not in mt_brf260 of expression &2

BRF155 - Overview

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 155

• Message text: Expression &1 is not in mt_brf260 of expression &2

Self-Explanatory Message

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BRF155 - Details

• The SAP error message BRF155, which states "Expression &1 is not in mt_brf260 of expression &2," typically occurs in the context of Business Rule Framework (BRF+) when there is an issue with the expression definitions or their references.
  
  Cause:
  
  Missing Expression: The expression referenced by &1 is not defined in the context of the expression &2. This could happen if the expression was deleted or not properly activated.
  Incorrect Reference: The expression might be incorrectly referenced in the rule or decision table, leading to a mismatch.
  Transport Issues: If the expressions were transported from one system to another, there might be inconsistencies or missing objects in the target system.
  Versioning Issues: If there are multiple versions of the expressions, the system might be referencing an outdated or incorrect version.
  
  
  Solution:
  
  Check Expression Definitions: Verify that the expression &1 exists in the BRF+ application and is correctly defined. Ensure that it is active and not in a draft