How To Fix CNV_PE_CHECK255 - Error in foreign key &1 of interface parameter &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE_CHECK - Check Framework messages for posting engine

• Message number: 255

• Message text: Error in foreign key &1 of interface parameter &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE_CHECK255 - Error in foreign key &1 of interface parameter &2 ?

  The SAP error message CNV_PE_CHECK255 typically indicates an issue with a foreign key constraint in the context of data migration or data transfer processes, particularly when using the SAP Conversion Tools or during data migration projects. This error suggests that there is a problem with the integrity of the data being processed, specifically related to foreign key relationships.
  Cause:
  
  
  Missing Foreign Key Values: The error often arises when the data being migrated or processed contains foreign key values that do not exist in the referenced table. This means that the system is trying to link to a record that is not present.
  
  
  Data Inconsistency: There may be inconsistencies in the data, such as incorrect or outdated references that violate the foreign key constraints.
  
  
  Incorrect Mapping: During the data migration process, if the mapping of fields is incorrect, it can lead to foreign key violations.
  
  
  Data Type Mismatch: Sometimes, the data types of the foreign key fields may not match, leading to issues when the system tries to enforce the foreign key relationship.
  
  
  Solution:
  
  
  Check Data Integrity: Review the data being migrated to ensure that all foreign key values exist in the corresponding tables. You can run queries to identify any missing references.
  
  
  Correct Mapping: Verify the mapping of fields in your migration tool or process. Ensure that the foreign key fields are correctly mapped to their corresponding primary key fields in the target tables.
  
  
  Data Cleansing: If there are inconsistencies in the data, perform data cleansing to correct any issues before attempting the migration again.
  
  
  Adjust Foreign Key Constraints: If necessary, you may need to temporarily disable foreign key constraints during the migration process and re-enable them afterward, but this should be done with caution and a thorough understanding of the implications.
  
  
  Consult Documentation: Refer to the SAP documentation or notes related to the specific migration tool you are using for any additional guidance or troubleshooting steps.
  
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary) to check the structure of the tables involved and their relationships.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Data Migration Tools: Familiarize yourself with the specific data migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) as they may have specific guidelines for handling foreign key constraints.
  
  If the issue persists after following these steps, it may be beneficial to engage with SAP support or consult with a technical expert who specializes in SAP data migration.