How To Fix CNV_DMC_MD_EXTRACTOR030 - Field type could not be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MD_EXTRACTOR - meta data extractor message class

• Message number: 030

• Message text: Field type could not be determined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MD_EXTRACTOR030 - Field type could not be determined ?

  The SAP error message CNV_DMC_MD_EXTRACTOR030: Field type could not be determined typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that the system is unable to determine the data type of a specific field in the source system, which can hinder the data extraction or transformation process.
  Causes:
  
  Inconsistent Data Structure: The source system may have inconsistent or non-standard data structures, making it difficult for the extractor to identify the field types.
  Missing Metadata: The metadata for the fields in the source system may be incomplete or missing, leading to ambiguity in determining the field types.
  Unsupported Data Types: The field may contain a data type that is not supported by the DMC or the target system.
  Configuration Issues: There may be configuration issues in the DMC settings or the source system that prevent proper field type recognition.
  Custom Fields: If there are custom fields in the source system, the extractor may not have the necessary information to determine their types.
  
  Solutions:
  
  Check Metadata: Ensure that the metadata for the source system is complete and correctly defined. This includes checking the data dictionary and ensuring that all fields have defined types.
  Review Data Structure: Examine the data structure in the source system for inconsistencies or unsupported data types. Make necessary adjustments to align with standard practices.
  Update DMC Configuration: Review and update the configuration settings in the Data Migration Cockpit to ensure that it is set up correctly to handle the source data.
  Custom Field Handling: If custom fields are involved, ensure that they are properly defined in the DMC and that the extractor has the necessary logic to handle them.
  Consult Documentation: Refer to SAP documentation for the Data Migration Cockpit and the specific extractor being used to understand any limitations or requirements regarding field types.
  Log Analysis: Analyze the logs generated during the extraction process to identify any specific fields or records that are causing the issue. This can provide insights into what needs to be corrected.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP, which can help prevent such issues in the future.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.