How To Fix CRM_BRF045 - Tag expression &1 is used by tags, but has multiple results

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_BRF -

• Message number: 045

• Message text: Tag expression &1 is used by tags, but has multiple results

What causes this issue?

The tag expression &V1& is used in other tag expressions, but has more
than one result. This is not permitted in the BRF architecture and leads
to incorrect results.
Make sure that the tag expression &V1& delivers one result maximum.

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?

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 CRM_BRF045 - Tag expression &1 is used by tags, but has multiple results ?

  The SAP error message CRM_BRF045 indicates that there is an issue with a tag expression in the Business Rule Framework (BRF) where the expression is being used by multiple tags but is returning multiple results. This can lead to ambiguity in the rule evaluation process, as the system does not know which result to use.
  Cause:
  
  Multiple Results: The tag expression is designed to return a single result, but it is returning multiple results instead. This can happen if the logic defined in the expression is not specific enough or if there are overlapping conditions that lead to multiple valid outcomes.
  Improper Configuration: The configuration of the tags or the expressions may not be set up correctly, leading to conflicts in the evaluation.
  Data Issues: The underlying data being evaluated may have inconsistencies or duplicates that cause the expression to yield multiple results.
  
  Solution:
  
  Review the Tag Expression: Check the logic of the tag expression to ensure that it is designed to return a single result. You may need to refine the conditions or the logic to eliminate ambiguity.
  Check Tag Usage: Verify how the tag is being used across different rules or expressions. Ensure that it is not being referenced in a way that could lead to multiple evaluations.
  Debugging: Use debugging tools available in the BRF to trace the execution of the tag expression and see where it is returning multiple results. This can help identify the specific conditions causing the issue.
  Data Validation: Ensure that the data being processed does not have duplicates or conflicting entries that could lead to multiple results. Clean up the data if necessary.
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance on the BRF and tag expressions, as there may be known issues or best practices that can help resolve the problem.
  
  Related Information:
  
  BRF (Business Rule Framework): A tool in SAP that allows users to define and manage business rules in a centralized manner.
  Tag Expressions: Used in BRF to categorize or classify data based on certain conditions. They should ideally return a single, unambiguous result.
  SAP Notes and Support: If the issue persists, consider checking SAP Notes for any patches or updates related to BRF or the specific error message. You can also reach out to SAP support for assistance.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.