How To Fix CNV_DMC_MC079 - Name must start with a valid namespace ('Y' or 'Z' or '//')

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC - Migration Object Modeler

• Message number: 079

• Message text: Name must start with a valid namespace ('Y' or 'Z' or '//')

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC079 - Name must start with a valid namespace ('Y' or 'Z' or '//') ?

  The SAP error message CNV_DMC_MC079 indicates that a name you are trying to use does not conform to the naming conventions required by SAP. Specifically, it states that the name must start with a valid namespace, which can be either 'Y', 'Z', or a custom namespace that begins with a forward slash (e.g., '//').
  Cause:
  This error typically occurs in the following scenarios:
  
  Invalid Object Name: You are trying to create or reference an object (like a table, function module, or class) that does not start with the required namespace.
  Custom Development: In custom development, SAP requires that custom objects use a specific naming convention to avoid conflicts with standard SAP objects.
  Migration or Conversion Activities: If you are using tools for data migration or conversion (like SAP S/4HANA Migration Cockpit), this error may arise if the names of the objects being processed do not adhere to the naming rules.
  
  Solution:
  To resolve this error, you should:
  
  Check the Object Name: Ensure that the name of the object you are trying to create or reference starts with 'Y', 'Z', or a valid custom namespace.
  
  For example, if you are creating a custom table, the name should be something like Z_MY_TABLE or Y_MY_TABLE.
  
  
  Modify the Name: If the name does not conform to the required format, modify it to start with one of the valid prefixes.
  Review Custom Namespaces: If you are using a custom namespace (e.g., '/MYNAMESPACE/'), ensure that it is correctly defined and that the object name follows the format '/MYNAMESPACE/OBJECT_NAME'.
  Consult Documentation: If you are using a specific SAP tool or transaction, refer to the relevant documentation for any additional naming conventions or requirements.
  
  Related Information:
  
  Namespaces in SAP: SAP uses namespaces to differentiate between standard SAP objects and custom objects. The 'Y' and 'Z' namespaces are reserved for customer developments.
  Development Guidelines: Always follow SAP's development guidelines when creating custom objects to avoid conflicts and ensure compatibility with future updates.
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or solutions related to this error message.
  
  By ensuring that your object names conform to the required naming conventions, you should be able to resolve the CNV_DMC_MC079 error.