How To Fix FKC_API001 - Internal ID and Legacy ID are missing for field &1

SAP Error Message - Details

• Message type: E = Error

• Message class: FKC_API - Message class for FI-CAC APIs

• Message number: 001

• Message text: Internal ID and Legacy ID are missing for field &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKC_API001 - Internal ID and Legacy ID are missing for field &1 ?

  The SAP error message FKC_API001 indicates that both the Internal ID and Legacy ID are missing for a specific field in the context of financial accounting or related processes. This error typically arises when there is an attempt to process financial data, such as during the posting of documents or during data migration, and the system cannot find the necessary identifiers for the transaction or record.
  Cause:
  
  Missing Data: The most common cause is that the required fields (Internal ID and Legacy ID) are not populated in the relevant data structure or table.
  Configuration Issues: There may be configuration issues in the system that prevent the proper mapping of IDs.
  Data Migration Issues: If data is being migrated from another system, it’s possible that the mapping of IDs was not done correctly, leading to missing identifiers.
  Custom Development: If there are custom programs or enhancements, they may not be handling the IDs correctly.
  
  Solution:
  
  Check Data Entry: Ensure that the data being processed includes the necessary Internal ID and Legacy ID. If you are entering data manually, verify that all required fields are filled.
  Review Configuration: Check the configuration settings related to the financial accounting module to ensure that the mapping of IDs is correctly set up.
  Data Migration Review: If this error occurs during a data migration process, review the migration scripts or tools to ensure that they are correctly populating the Internal ID and Legacy ID fields.
  Debugging: If you have access to the development environment, you can debug the program or transaction that is generating the error to identify where the IDs are being lost or not set.
  Consult Documentation: Review SAP documentation or notes related to the specific transaction or process you are working with to see if there are any known issues or additional configuration steps required.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if this is a production issue.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may want to check transaction codes related to financial postings (e.g., FB01, F-02) or data migration tools (e.g., LSMW).
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional troubleshooting steps.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the root cause of the FKC_API001 error and implement a solution to resolve it.