How To Fix WN751 - Entry in table CKMLAB01 with value äASCHEMA=0001ô is missing

SAP Error Message - Details

• Message type: E = Error

• Message class: WN - Plant master data maintenance (integrated)

• Message number: 751

• Message text: Entry in table CKMLAB01 with value äASCHEMA=0001ô is missing

What causes this issue?

Entry in table CKMLAB01 with value ?ASCHEMA=0001? is missing.

System Response

You may not activate the material ledger, because your data are not
consistent.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WN751 - Entry in table CKMLAB01 with value äASCHEMA=0001ô is missing ?

  The SAP error message WN751 indicates that there is a missing entry in the table CKMLAB01 for a specific value related to the material ledger. This error typically arises in the context of Material Ledger and Actual Costing in SAP, particularly when the system is trying to access or process data that is not available in the specified table.
  Cause:
  
  Missing Configuration: The entry for the specified schema (in this case, ASCHEMA=0001) may not have been created or configured properly in the system.
  Data Migration Issues: If data was migrated from another system or if there were changes in the configuration, it is possible that the necessary entries were not transferred or created.
  Inconsistent Data: There may be inconsistencies in the data that prevent the system from finding the required entry.
  Incorrect Settings: The settings for the Material Ledger or Actual Costing may not be correctly defined, leading to missing entries.
  
  Solution:
  
  Check Configuration: Verify the configuration settings for the Material Ledger and ensure that the schema 0001 is properly defined. You can do this by navigating to the relevant configuration settings in the SAP system.
  Create Missing Entries: If the entry is indeed missing, you may need to create it manually. This can typically be done through transaction codes like CKM3N (for displaying material ledger data) or CKMLCP (for actual costing).
  Data Consistency Check: Run consistency checks to identify any other potential issues in the Material Ledger. You can use transaction CKMLCP to perform a consistency check.
  Review Migration Logs: If the issue arose after a data migration, review the migration logs to identify any errors or warnings that may indicate why the entry is missing.
  Consult Documentation: Refer to SAP documentation or notes related to Material Ledger and Actual Costing for any specific instructions or troubleshooting steps.
  Contact SAP Support: If the issue persists and you are unable to resolve it, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CKM3N, CKMLCP, and CKMLAN for managing and analyzing Material Ledger data.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Material Ledger Configuration: Ensure that the Material Ledger is activated for the relevant company codes and that all necessary settings are in place.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.