How To Fix CNV20200858 - &1 not yet known! Conversion rule for &2=&3 not applicable

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20200 - Messages for development class CNV_20200

• Message number: 858

• Message text: &1 not yet known! Conversion rule for &2=&3 not applicable

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20200858 - &1 not yet known! Conversion rule for &2=&3 not applicable ?

  The SAP error message CNV20200858 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a specific conversion rule for a particular field or data element is not defined or applicable in the current context.
  Cause:
  
  Missing Conversion Rule: The error suggests that there is no defined conversion rule for the specified source and target fields. This can happen if the data model has changed or if the migration project is not fully configured.
  Incompatible Data Types: The source and target fields may have incompatible data types or formats, leading to the inability to apply a conversion rule.
  Configuration Issues: There may be issues in the configuration of the migration project, such as missing or incorrect mapping of fields.
  
  Solution:
  
  Check Conversion Rules: Review the conversion rules defined in the migration project. Ensure that there is a valid rule for the specified source and target fields.
  Define Missing Rules: If a conversion rule is missing, you may need to create a new rule that defines how to convert the data from the source format to the target format.
  Data Mapping: Verify the data mapping configuration to ensure that all necessary fields are correctly mapped and that the data types are compatible.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using to understand the expected configuration and rules.
  Testing: After making changes, perform a test migration to ensure that the error is resolved and that data is being converted correctly.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools and guidelines for data migration.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can provide insights or solutions.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurred.