How To Fix COM_DIFF_KEY020 - *** COMS_LH_OBJ_KEY ***

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_DIFF_KEY - Messages for Differentiation Key

• Message number: 020

• Message text: *** COMS_LH_OBJ_KEY ***

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message COM_DIFF_KEY020 - *** COMS_LH_OBJ_KEY *** ?

  The SAP error message COM_DIFF_KEY020 with the associated object COMS_LH_OBJ_KEY typically indicates a discrepancy in the key fields of a document or object in the SAP system. This error often arises in the context of the SAP Controlling (CO) module, particularly when dealing with cost objects, internal orders, or other financial documents.
  Cause:
  The error usually occurs due to one of the following reasons:
  
  Mismatched Key Fields: The key fields (such as cost center, internal order, or project) in the document do not match the expected values in the system.
  Data Inconsistency: There may be inconsistencies in the master data or transactional data that lead to this error.
  Configuration Issues: Incorrect configuration in the controlling area or related settings can also lead to this error.
  Missing or Incorrect Master Data: The required master data for the cost object may be missing or incorrectly set up.
  
  Solution:
  To resolve the COM_DIFF_KEY020 error, you can take the following steps:
  
  
  Check Key Fields: Verify that the key fields in the document match the expected values in the system. Ensure that the cost center, internal order, or project assigned to the document is valid and active.
  
  
  Review Master Data: Check the master data for the relevant cost objects. Ensure that all necessary data is correctly maintained and that there are no discrepancies.
  
  
  Analyze Configuration: Review the configuration settings in the controlling area and related modules. Ensure that all settings are correctly defined and aligned with your business processes.
  
  
  Transaction Logs: Look at the transaction logs or error logs to get more details about the specific conditions that triggered the error. This can provide insights into what might be wrong.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to this error message for any specific guidance or patches that may be available.
  
  
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide additional insights or solutions based on the specific context of your system.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide updates.
  Transaction Codes: Familiarize yourself with transaction codes related to controlling and master data management, such as KS01 (Create Cost Center), KO01 (Create Internal Order), etc.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the COM_DIFF_KEY020 error in your SAP system.