How To Fix RP818 - Source matrix and target matrix are identical

SAP Error Message - Details

• Message type: E = Error

• Message class: RP - Error Messages for Infotype Module Pools

• Message number: 818

• Message text: Source matrix and target matrix are identical

What causes this issue?

While trying to copy a matrix you have attempted to copy a matrix onto
itself which is redundantly reduntant.
Keep in mind that the key to matrix is the compensation modifier, the
table ID and the enddate, so changing just the beginning date will also
cause the error that the tables are the same.

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?

Check your source and target matrices and change one or the other. Be
more careful next time, as such copy functions can often be dangerous.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RP818 - Source matrix and target matrix are identical ?

  The SAP error message RP818, which states "Source matrix and target matrix are identical," typically occurs in the context of payroll processing or when working with wage types in SAP HR (Human Resources). This error indicates that the system has detected that the source and target matrices for a wage type or payroll calculation are the same, which is not allowed.
  Cause:
  
  Identical Configuration: The source and target matrices are configured identically, meaning that there is no change or transformation being applied to the data.
  Incorrect Mapping: During the configuration of wage types or payroll processing, the mapping between source and target matrices may have been set up incorrectly, leading to them being the same.
  Data Entry Error: There may have been an error in data entry or configuration that resulted in the same matrix being assigned to both the source and target.
  
  Solution:
  
  Review Configuration: Check the configuration of the wage types or payroll processing settings. Ensure that the source and target matrices are intended to be different. If they are meant to be different, adjust the configuration accordingly.
  Adjust Mapping: If the mapping is incorrect, update the mapping to ensure that the source and target matrices reflect the intended transformations or calculations.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to properly configure wage types and matrices.
  Testing: After making changes, run a test payroll or simulation to ensure that the error is resolved and that the payroll calculations are functioning as expected.
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP HR expert for further assistance.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as PE01 (Wage Type Maintenance) or PC00_MXX_CALC (Payroll Calculation) to access the relevant configurations.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP Help Portal for detailed information on payroll processing and wage type configuration.
  
  By following these steps, you should be able to identify the cause of the RP818 error and implement a solution to resolve it.