How To Fix FDT_EXPRESSIONS258 - Decision Table Rows cannot be merged as result is different

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 258

• Message text: Decision Table Rows cannot be merged as result is different

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS258 - Decision Table Rows cannot be merged as result is different ?

  The SAP error message FDT_EXPRESSIONS258 indicates that there is an issue with merging rows in a decision table due to differing results. This typically occurs in the context of SAP Business Rules Framework (BRF+) or similar decision-making tools where decision tables are used to evaluate conditions and produce results.
  Cause:
  The error arises when you attempt to merge two or more rows in a decision table that have the same conditions but yield different results. In decision tables, merging rows is allowed only when the results for those rows are identical. If the results differ, the system cannot determine which result to use, leading to this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Decision Table Rows: Examine the rows in your decision table that you are trying to merge. Identify the rows that have the same conditions but different results.
  
  
  Standardize Results: If the rows are indeed meant to have the same outcome, update the results so that they are consistent across the rows you wish to merge.
  
  
  Remove Redundant Rows: If the rows are not meant to be merged (i.e., they should yield different results based on the same conditions), consider removing one of the rows or adjusting the conditions so that they are distinct.
  
  
  Check for Logical Errors: Ensure that the logic behind the decision table is sound. Sometimes, the presence of conflicting results may indicate a logical error in how the rules are defined.
  
  
  Test Changes: After making adjustments, test the decision table to ensure that it behaves as expected and that the error no longer occurs.
  
  
  Related Information:
  
  Decision Tables: These are used to represent complex business rules in a tabular format, allowing for easier management and understanding of conditions and outcomes.
  BRF+: The Business Rules Framework plus (BRF+) is a powerful tool in SAP for managing business rules and decision logic.
  Documentation: Refer to SAP Help documentation for BRF+ and decision tables for more detailed guidance on best practices and troubleshooting.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting the SAP community for further assistance.