BRF191 - Decision expression &1 in CASE &2 cannot be evaluated

SAP Error Message - Details

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 191

• Message text: Decision expression &1 in CASE &2 cannot be evaluated

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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AnswerBot

• What is the cause and solution for SAP error message BRF191 - Decision expression &1 in CASE &2 cannot be evaluated ?

  The SAP error message BRF191 indicates that there is an issue with the evaluation of a decision expression within a Business Rule Framework (BRF+) case statement. This error typically arises when the decision expression cannot be processed due to various reasons, such as incorrect syntax, missing data, or logical errors in the expression.
  Causes of BRF191 Error
  
  Syntax Errors: The decision expression may contain syntax errors that prevent it from being evaluated correctly.
  Data Issues: The data being referenced in the decision expression may be missing or not in the expected format.
  Logical Errors: There may be logical inconsistencies in the expression that make it impossible to evaluate.
  Invalid References: The expression might reference objects (like variables or constants) that do not exist or are not accessible in the current context.
  Configuration Issues: The BRF+ configuration might not be set up correctly, leading to evaluation failures.
  
  Solutions
  
  Check Syntax: Review the decision expression for any syntax errors. Ensure that all operators and functions are used correctly.
  Validate Data: Ensure that all data elements referenced in the expression are available and correctly formatted. You can use debugging tools in BRF+ to check the data being passed.
  Review Logic: Analyze the logic of the decision expression to ensure that it makes sense and does not lead to contradictions.
  Check References: Verify that all variables, constants, and other objects referenced in the expression are defined and accessible in the current context.
  Test in Isolation: If possible, isolate the decision expression and test it independently to see if it evaluates correctly.
  Consult Documentation: Refer to SAP documentation for BRF+ to understand the expected syntax and usage of decision expressions.
  Debugging: Use the BRF+ debugging tools to step through the evaluation process and identify where it fails.
  
  Related Information
  
  BRF+ Documentation: SAP provides extensive documentation on BRF+, including guidelines for creating and troubleshooting decision tables and expressions.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide patches related to BRF+.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can offer insights or solutions.
  Training Resources: Consider SAP training resources or courses that cover BRF+ in detail, which can help in understanding how to effectively create and troubleshoot decision expressions.
  
  By following these steps, you should be able to identify the cause of the BRF191 error and implement a solution to resolve it.