How To Fix CNV_DMC_MC_EXCEPTION163 - Cannot map source structure to target; source structure &1 is read-only

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 163

• Message text: Cannot map source structure to target; source structure &1 is read-only

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_DMC_MC_EXCEPTION163 - Cannot map source structure to target; source structure &1 is read-only ?

  The SAP error message CNV_DMC_MC_EXCEPTION163 indicates that there is an issue with mapping a source structure to a target structure during a data migration or conversion process. Specifically, the error states that the source structure is read-only, which means that the system cannot modify or map it to the target structure.
  Cause:
  
  Read-Only Source Structure: The source structure you are trying to map is set to read-only, which prevents any modifications or mappings from being applied.
  Incorrect Configuration: There may be a misconfiguration in the data migration cockpit or the mapping settings that leads to this error.
  Data Migration Tool Limitations: The data migration tool being used may have limitations or restrictions regarding the source structures that can be modified or mapped.
  
  Solution:
  
  Check Source Structure Settings: Verify the settings of the source structure in the data migration tool. Ensure that it is not set to read-only. If it is, you may need to change its properties or use a different source structure that is editable.
  Review Mapping Configuration: Go through the mapping configuration to ensure that it is correctly set up. Make sure that the source and target structures are compatible and that the mapping rules are correctly defined.
  Use a Different Source Structure: If the current source structure is inherently read-only, consider using an alternative structure that allows for mapping.
  Consult Documentation: Refer to the SAP documentation for the specific data migration tool you are using. There may be specific guidelines or best practices for handling read-only structures.
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration or version.
  
  Related Information:
  
  Data Migration Cockpit: Familiarize yourself with the Data Migration Cockpit in SAP, as it provides tools and functionalities for data migration processes.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.