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