How To Fix CNV_CMIS_A_20_FUNC041 - Comparison stopped: DDIC structure merge could not be done

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CMIS_A_20_FUNC - Message texts for CNV_CMIS_A_20 function modules

• Message number: 041

• Message text: Comparison stopped: DDIC structure merge could not be done

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 CNV_CMIS_A_20_FUNC041 - Comparison stopped: DDIC structure merge could not be done ?

  The SAP error message CNV_CMIS_A_20_FUNC041 indicates that there is an issue with merging Data Dictionary (DDIC) structures during a conversion or migration process. This error typically arises in the context of SAP's data migration tools, particularly when using the SAP S/4HANA Migration Cockpit or other conversion tools.
  Cause:
  The error can occur due to several reasons, including:
  
  Incompatible Data Structures: The source and target structures may have incompatible fields or data types that prevent them from being merged.
  Missing Fields: Required fields in the target structure may be missing in the source structure.
  Data Type Mismatches: There may be discrepancies in data types between the source and target structures (e.g., CHAR vs. VARCHAR).
  Field Length Issues: The lengths of fields in the source and target structures may not match, leading to issues during the merge.
  Custom Enhancements: Custom fields or enhancements in the source system that do not exist in the target system can also lead to this error.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  Analyze the Structures: Review the DDIC structures involved in the merge. Check for any discrepancies in field names, types, and lengths.
  Adjust Data Structures: If possible, modify the source or target structures to ensure compatibility. This may involve adding missing fields or changing data types.
  Check for Custom Fields: If there are custom fields in the source system, ensure that they are also defined in the target system.
  Use Mapping: If the structures are fundamentally different, consider using mapping techniques to transform the data appropriately during the migration.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional guidance.
  Run Pre-checks: Use any available pre-check tools provided by SAP to identify potential issues before running the migration.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for detailed guidelines on data structure requirements.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.