How To Fix AH602 - Schema step &1 cannot be executed

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 602

• Message text: Schema step &1 cannot be executed

What causes this issue?

You have set the indicator <LS>N</> (Execute schema step for
backbilling only) in schema step &V1&. However, the 'execute
backbilling' indicator was not set. Therefore, step &V1& is never
executed in billing. The schema is inconsistent and cannot be saved.
&SYSTEM REPONSE<(>&<)>

How to fix this error?

Delete the indicator <LS>N</> or
allocate the schema step to a backbilling group via an 'execute
backbilling' indicator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH602 - Schema step &1 cannot be executed ?

  The SAP error message AH602, which states "Schema step &1 cannot be executed," typically occurs in the context of payroll processing or when executing a schema in the SAP HR module. This error indicates that there is an issue with the specific step in the payroll schema that is preventing it from being executed.
  Causes:
  
  Incorrect Configuration: The schema step may not be properly configured or may be missing required parameters.
  Missing Master Data: Required employee master data or infotypes may be missing or incomplete, which can prevent the schema from executing correctly.
  Authorization Issues: The user executing the payroll may not have the necessary authorizations to run the specific schema step.
  Logical Errors in the Schema: There may be logical errors or inconsistencies in the schema itself, such as incorrect conditions or sequences.
  Technical Issues: There could be underlying technical issues, such as database problems or system inconsistencies.
  
  Solutions:
  
  Check Configuration: Review the configuration of the payroll schema and the specific step that is causing the error. Ensure that all required parameters are set correctly.
  Verify Master Data: Ensure that all necessary employee master data and infotypes are complete and accurate. This includes checking for missing or incorrect entries.
  Review Authorizations: Check the user’s authorizations to ensure they have the necessary permissions to execute the payroll schema.
  Debug the Schema: Use the SAP debugging tools to step through the schema execution and identify where the error occurs. This can help pinpoint the exact issue.
  Consult Documentation: Refer to SAP documentation or notes related to the specific schema step for any known issues or additional configuration requirements.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it appears to be a bug or a more complex issue.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like PE01 (Schema Maintenance) to review and modify the payroll schema.
  SAP Notes: Check SAP Notes for any updates or patches related to the payroll schema or specific error messages.
  Testing: After making changes, conduct thorough testing in a development or quality assurance environment before applying changes to production.
  
  By following these steps, you should be able to identify and resolve the issue related to the AH602 error message in SAP.