How To Fix 28136 - Characteristic variable &2 (facet &1) is declared but not used

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 136

• Message text: Characteristic variable &2 (facet &1) is declared but not used

What causes this issue?

If you define variables that are not used in a constraint or rule, the
variables are saved, but you see a warning message.
The variable for the characteristic facet pair (for example, DOMAIN
COLOR) of an object is declared in the OBJECTS section, but is not used
again:
OBJECTS:
?x is_a (300)printer
where ?dc = domain color

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 28136 - Characteristic variable &2 (facet &1) is declared but not used ?

  The SAP error message 28136 indicates that a characteristic variable has been declared in a query or report but is not being utilized anywhere in the context of that query or report. This can occur in various SAP modules, particularly in SAP BW (Business Warehouse) or SAP HANA environments where queries are defined using characteristics and variables.
  Cause:
  
  Unused Variable: The characteristic variable is defined but not referenced in any of the selections, filters, or calculations within the query.
  Query Design: The variable may have been intended for use but was inadvertently left out during the design of the query.
  Changes in Requirements: The business requirements may have changed, leading to the variable being no longer necessary.
  
  Solution:
  
  Review the Query: Check the query definition to see if the variable is indeed not being used. If it is not needed, consider removing it from the query definition.
  Utilize the Variable: If the variable is still relevant, ensure that it is included in the appropriate selections, filters, or calculations within the query.
  Documentation: Document the purpose of the variable and its intended use to avoid confusion in the future.
  Testing: After making changes, test the query to ensure that it functions as expected without the error message.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message.
  Query Designer: Familiarize yourself with the Query Designer tool in SAP BW or the relevant environment to better understand how to manage variables.
  Best Practices: Follow best practices for query design, including regular reviews of variables and characteristics to ensure they are necessary and utilized effectively.
  
  By addressing the cause of the error and implementing the suggested solutions, you can resolve the issue and improve the efficiency of your SAP queries.