How To Fix BRF139 - The expressions of WHEN lines do not all deliver the same result type

SAP Error Message - Details

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 139

• Message text: The expressions of WHEN lines do not all deliver the same result type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BRF139 - The expressions of WHEN lines do not all deliver the same result type ?

  The SAP error message BRF139 indicates that there is a mismatch in the result types of the expressions defined in the WHEN lines of a Business Rule Framework (BRF) decision table or rule. This typically occurs when the conditions specified in the WHEN lines evaluate to different data types, which is not allowed in BRF.
  Cause:
  The error arises when:
  
  The expressions in the WHEN lines return different data types (e.g., some return a string while others return a number).
  The result types of the expressions are not compatible with each other, leading to ambiguity in the evaluation of the rules.
  
  Solution:
  To resolve the BRF139 error, follow these steps:
  
  
  Review the Expressions: Check each WHEN line in your decision table or rule. Ensure that all expressions return the same data type. For example, if one expression returns a string, all others should also return strings.
  
  
  Modify Data Types: If you find that some expressions return different types, you may need to modify them. You can use conversion functions to ensure that all expressions return the same type. For example, if you have a numeric expression, you can convert it to a string using appropriate conversion functions.
  
  
  Check Data Type Definitions: Ensure that the data types defined for the variables used in the expressions are consistent. If necessary, redefine the data types in the BRF configuration.
  
  
  Test the Changes: After making the necessary adjustments, test the rule again to ensure that the error is resolved.
  
  
  Documentation and Comments: It can be helpful to document the changes made and add comments in the BRF rules for future reference, especially if the rules are complex.
  
  
  Related Information:
  
  BRF+ Documentation: Refer to the official SAP documentation for BRF+ for detailed information on data types and expressions.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  Debugging Tools: Utilize the debugging tools available in SAP to trace the execution of the rules and identify where the type mismatch occurs.
  
  By ensuring that all expressions in the WHEN lines return the same result type, you can effectively resolve the BRF139 error and ensure the proper functioning of your BRF rules.