How To Fix CNVHCM_PRESEL121 - Remove object type for the last relationship of limit in step &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVHCM_PRESEL - TDMS4HCM: Messages for Object Selection

• Message number: 121

• Message text: Remove object type for the last relationship of limit in step &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNVHCM_PRESEL121 - Remove object type for the last relationship of limit in step &1 ?

  The SAP error message CNVHCM_PRESEL121 typically occurs during the data migration process, particularly when using the SAP HCM (Human Capital Management) module. This error indicates that there is an issue with the relationships defined for an object type in the context of a limit or constraint.
  Cause:
  The error message CNVHCM_PRESEL121 is triggered when the system detects that you are trying to remove an object type that is the last relationship of a limit in a specific step of the migration process. This usually happens when:
  
  Data Integrity Issues: There are existing relationships that are not properly defined or are missing, leading to an attempt to remove a critical relationship.
  Incorrect Configuration: The configuration settings for the migration process may not align with the existing data structure.
  Dependency Violations: The object type you are trying to remove has dependencies that are not being respected, leading to a violation of the expected data model.
  
  Solution:
  To resolve the CNVHCM_PRESEL121 error, you can follow these steps:
  
  
  Check Relationships: Review the relationships defined for the object type in question. Ensure that there are no remaining dependencies that require the object type to be present.
  
  
  Data Validation: Validate the data being migrated to ensure that all necessary relationships are correctly defined and that there are no orphaned records.
  
  
  Adjust Migration Steps: If you are using a migration tool or process, check the steps involved. You may need to adjust the sequence of operations to ensure that you are not trying to remove an object type prematurely.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration process you are using. There may be specific guidelines or prerequisites that need to be followed.
  
  
  Use Transaction Codes: Utilize relevant transaction codes (like SE11 for data dictionary, SE80 for object navigator) to analyze the data model and relationships.
  
  
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide insights based on your specific configuration and data.
  
  
  Related Information:
  
  SAP Notes: Check for any SAP Notes related to the CNVHCM_PRESEL121 error. SAP frequently releases notes that address known issues and provide solutions or workarounds.
  Migration Tools: Familiarize yourself with the tools and methodologies used for data migration in SAP HCM, such as LSMW (Legacy System Migration Workbench) or the SAP S/4HANA Migration Cockpit.
  Testing: Always perform testing in a development or quality assurance environment before executing migration processes in production to avoid data integrity issues.
  
  By following these steps, you should be able to identify the root cause of the CNVHCM_PRESEL121 error and implement a suitable solution.