How To Fix AJ135 - Operand &1 requires a weighting key

SAP Error Message - Details

• Message type: E = Error

• Message class: AJ - Billing program

• Message number: 135

• Message text: Operand &1 requires a weighting key

What causes this issue?

A variant is to be executed for which a quantity has been valuated and
a billing line item relevant to posting is generated. Statistics are
usually updated in this case. A weighting key is required to break down
the quantity correctly in statistics, but no weighting key has been
specified.

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?

Maintain the <ZH>weighting key</> field in the operand.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AJ135 - Operand &1 requires a weighting key ?

  The SAP error message AJ135, which states "Operand &1 requires a weighting key," typically occurs in the context of SAP Controlling (CO) when working with activity types, cost centers, or internal orders. This error indicates that a specific operand in a calculation or allocation process is missing a required weighting key, which is necessary for the system to perform the calculation correctly.
  Cause:
  
  Missing Weighting Key: The operand referenced in the error message is expected to have a weighting key assigned, but it is either missing or not properly configured.
  Configuration Issues: The configuration for the relevant cost element, activity type, or allocation structure may not be set up correctly.
  Data Entry Errors: There may be errors in the data entry where the weighting key should have been specified.
  
  Solution:
  
  
  Check Configuration:
  
  Go to the configuration settings for the relevant module (e.g., CO) and ensure that the weighting key is defined for the operand in question.
  Verify that the activity types, cost centers, or internal orders are correctly configured to use the appropriate weighting keys.
  
  
  
  Assign Weighting Key:
  
  If the operand requires a weighting key, you need to assign it. This can usually be done in the master data settings for the relevant cost object.
  Navigate to the relevant transaction (e.g., KP26 for activity type planning) and ensure that the weighting key is assigned to the appropriate cost center or activity type.
  
  
  
  Review Allocation Structure:
  
  If the error occurs during an allocation process, check the allocation structure to ensure that all operands have the necessary weighting keys defined.
  
  
  
  Data Validation:
  
  Review the data entries for any inconsistencies or missing information. Ensure that all required fields are filled out correctly.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on the configuration of weighting keys and operands in your version of SAP.
  
  
  
  Related Information:
  
  Weighting Key: A weighting key is used in SAP to determine how costs are allocated among different cost objects. It is essential for accurate cost distribution and reporting.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KP26 (Activity Type Planning), KSU5 (Cost Center Planning), or KSV5 (Order Planning) to manage and review your configurations.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message, as there may be patches or recommendations from SAP.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP Controlling for further assistance.