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

CNV20305609 - Overview

• 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.

CNV20305609 - Details

• 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