How To Fix CFD_DDIC_ADAPTER018 - Append Adapter: Checking Append structure &1 failed

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_DDIC_ADAPTER - Custom Fields: CDS Adapter

• Message number: 018

• Message text: Append Adapter: Checking Append structure &1 failed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_DDIC_ADAPTER018 - Append Adapter: Checking Append structure &1 failed ?

  The SAP error message CFD_DDIC_ADAPTER018, which states "Append Adapter: Checking Append structure &1 failed," typically occurs when there is an issue with the append structure in the Data Dictionary (DDIC) of SAP. This error can arise during data processing or when trying to activate or use an append structure that is not correctly defined or has inconsistencies.
  Causes:
  
  Inconsistent Append Structure: The append structure may not be properly defined or may have inconsistencies with the base table.
  Data Element Issues: The data elements used in the append structure may not be compatible with the base table.
  Transport Issues: If the append structure was transported from another system, there may be issues related to the transport that need to be resolved.
  Missing Fields: The fields defined in the append structure may not exist in the base table or may have been deleted.
  Activation Issues: The append structure may not have been activated properly in the Data Dictionary.
  
  Solutions:
  
  
  Check Append Structure Definition:
  
  Go to the Data Dictionary (transaction SE11) and check the definition of the append structure. Ensure that it is correctly defined and that all fields are valid.
  
  
  
  Validate Data Elements:
  
  Ensure that the data elements used in the append structure are compatible with the base table. Check for any data type mismatches.
  
  
  
  Re-activate the Append Structure:
  
  If the append structure is not activated, try to activate it again. You can do this in transaction SE11 by selecting the append structure and choosing the "Activate" option.
  
  
  
  Check Transport Logs:
  
  If the append structure was transported, check the transport logs for any errors or warnings that may indicate issues during the transport process.
  
  
  
  Review Base Table:
  
  Check the base table to ensure that it is active and that there are no issues with its structure. You can do this in transaction SE11 as well.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the program or process that is triggering the error to identify the exact point of failure.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional guidance.
  
  
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE37 (Function Module), SE80 (Object Navigator).
  SAP Notes: Always check for SAP Notes related to your specific version of SAP, as they may provide patches or updates that resolve known issues.
  Documentation: Review SAP documentation for append structures and Data Dictionary management for best practices and guidelines.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to your SAP Basis or development team for further assistance.