How To Fix CNV20305606 - Problem in routine CNV_20305_REFBN_CO_REFBT: Unknown type (REFBT)

CNV20305606 - Overview

• Message type: E = Error

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

• Message number: 606

• Message text: Problem in routine CNV_20305_REFBN_CO_REFBT: Unknown type (REFBT)

What causes this issue?

Routine CNV_20305_REFBN_CO_REFBT converts a field based on the type in
field REFBT.
An unknown type occurred during the conversion: &V1&.
Additional information: The content of the field 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.

CNV20305606 - Details

• The SAP error message CNV20305606, which indicates a problem in the routine CNV_20305_REFBN_CO_REFBT due to 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 Data Type: The error suggests that the system encountered a reference type (REFBT) that it does not recognize. This could be due to:
  
  Missing or incorrectly defined data types in the migration structure.
  Incompatibility between the source and target systems, especially if the data model has changed.
  Issues with the mapping of data fields during the migration process.
  
  
  
  
  Configuration Issues: There may be configuration issues in the migration settings or the data mapping that lead to the system not being able to interpret the REFBT type correctly.
  
  
  Custom Code: If there are custom routines or enhancements in the migration process, they may not be handling the REFBT type properly.
  
  
  
  Solution:
  
  
  Check Data Mapping: Review the data mapping configuration in