How To Fix CNV_DMC_MC_EXCEPTION203 - Access type ôMapping onlyö should not be used for the header structure

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 203

• Message text: Access type ôMapping onlyö should not be used for the header structure

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION203 - Access type ôMapping onlyö should not be used for the header structure ?

  The SAP error message CNV_DMC_MC_EXCEPTION203 indicates that there is an issue with the access type being used for a header structure in a data migration context, specifically when using the Data Migration Cockpit (DMC). The error message states that the access type "Mapping only" should not be used for the header structure.
  Cause:
  This error typically arises when:
  
  The data migration process is trying to use a mapping type that is not appropriate for the header structure.
  The configuration of the data migration object is incorrect, where the header structure is expected to have a different access type (e.g., "Read" or "Read/Write") instead of "Mapping only."
  There may be a mismatch in the expected data structure or configuration settings in the DMC.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Configuration:
  
  Review the configuration of the data migration object in the DMC. Ensure that the header structure is set up correctly and that the access type is appropriate for the header.
  Change the access type from "Mapping only" to "Read" or "Read/Write" as required.
  
  
  
  Review Mapping Settings:
  
  Ensure that the mapping settings for the header structure are correctly defined. The header should be able to read data from the source and not just map it.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the Data Migration Cockpit to understand the requirements for header structures and the appropriate access types.
  
  
  
  Test the Migration:
  
  After making the necessary changes, test the migration process again to see if the error persists.
  
  
  
  Seek Support:
  
  If the issue continues, consider reaching out to SAP support or consulting with an SAP expert who can provide more specific guidance based on your system configuration.
  
  
  
  Related Information:
  
  Data Migration Cockpit (DMC): A tool provided by SAP to facilitate data migration from legacy systems to SAP S/4HANA or other SAP systems.
  Access Types: In the context of DMC, access types define how data is read or written during the migration process. Common access types include "Read," "Write," "Read/Write," and "Mapping only."
  Header Structure: In data migration, the header structure typically contains metadata or control information about the data being migrated, and it is crucial for the integrity of the migration process.
  
  By following these steps, you should be able to resolve the CNV_DMC_MC_EXCEPTION203 error and successfully proceed with your data migration.