How To Fix CNV20305609 - Problem in routine CNV_20305_REFBN_FM_REFBTYP: Unknown type (REFBT)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20305 - Messages for conversion packages in CO

• Message number: 609

• Message text: Problem in routine CNV_20305_REFBN_FM_REFBTYP: Unknown type (REFBT)

What causes this issue?

Routine CNV_20305_REFBN_CO_REFBTYP converts a field based on the type
in field REFBT.
An unknown type occurred during the conversion: &V1&.
Additional information: The value of the field that is meant to be
converted is &V2&.

System Response

The routine cannot convert the current field.
However the conversion is continued for the other fields and records.

How to fix this error?

An analysis is required to find out how the routine should react to the
unknown type; if necessary, the routine must be changed accordingly.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20305609 - Problem in routine CNV_20305_REFBN_FM_REFBTYP: Unknown type (REFBT) ?

  The SAP error message CNV20305609, which indicates a problem in the routine CNV_20305_REFBN_FM_REFBTYP with an "Unknown type (REFBT)", typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  
  
  Unknown Reference Type: The error suggests that the system encountered a reference type (REFBT) that it does not recognize. This could be due to:
  
  Missing or incorrect configuration in the migration settings.
  Data inconsistency or corruption in the source system.
  A mismatch between the expected data structure and the actual data being processed.
  
  
  
  Custom Development: If there are custom developments or enhancements in the system, they might not be compatible with the migration routines.
  
  
  Version Compatibility: The error may also arise if there are version mismatches between the source and target systems, especially if the migration tools or routines have been updated.
  
  
  Solution:
  
  
  Check Configuration: Review the migration configuration settings to ensure that all reference types are correctly defined and that the necessary mappings are in place.
  
  
  Data Validation: Validate the data in the source system to ensure that it conforms to the expected formats and types. Look for any anomalies or unexpected values in the reference type fields.
  
  
  Update Routines: If you are using custom routines, ensure they are updated and compatible with the current version of SAP. You may need to adjust the logic to handle the reference types correctly.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be notes or guidelines regarding the handling of reference types.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that address this specific error. There may be patches or updates available that resolve the issue.
  
  
  Debugging: If you have access to the development environment, consider debugging the routine CNV_20305_REFBN_FM_REFBTYP to identify the exact point of failure and gather more context about the unknown reference type.
  
  
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including any logs or screenshots.
  
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it is often the tool used for data migration.
  Data Migration Best Practices: Review best practices for data migration in SAP, including data cleansing, mapping, and validation techniques.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions or experiences.
  
  By following these steps, you should be able to diagnose and resolve the CNV20305609 error effectively.