How To Fix CNV20305608 - Problem in routine CNV_20305_REFBN_CO_REFBTYP: Unknown type (REFBT)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 608

• Message text: Problem in routine CNV_20305_REFBN_CO_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 CNV20305608 - Problem in routine CNV_20305_REFBN_CO_REFBTYP: Unknown type (REFBT) ?

  The SAP error message CNV20305608, which indicates a problem in the routine CNV_20305_REFBN_CO_REFBTYP 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 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.
  An unsupported or unrecognized data type in the source system.
  A mismatch between the source data and the expected data structure in the target system.
  
  
  
  Data Inconsistencies: The source data may contain entries that do not conform to the expected formats or types defined in the migration routines.
  
  
  Custom Developments: If there are custom developments or modifications in the source system that introduce new reference types, these may not be accounted for in the standard migration routines.
  
  
  Solution:
  
  
  Check Configuration: Review the migration settings and ensure that all necessary reference types are correctly defined and configured. This may involve checking the mapping of data types between the source and target systems.
  
  
  Data Validation: Validate the source data to ensure that it conforms to the expected formats. Look for any entries that may have invalid or unexpected reference types.
  
  
  Update Migration Routines: If the reference type (REFBT) is a valid type that should be recognized, you may need to update the migration routines or scripts to include this type. This could involve modifying the ABAP code in the routine CNV_20305_REFBN_CO_REFBTYP.
  
  
  Consult Documentation: Refer to the SAP documentation related to the specific migration process you are using. There may be notes or guidelines regarding handling unknown reference types.
  
  
  SAP Notes and Support: Check for any relevant SAP Notes that may address this specific error. If necessary, consider reaching out to SAP Support for assistance, especially if this is a recurring issue.
  
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its data migration processes, as well as the specific data structures and types it expects.
  Data Mapping: Understand the data mapping between the source and target systems, especially if you are migrating from an older SAP system to S/4HANA.
  Error Logs: Review the error logs and detailed messages provided during the migration process for additional context on the issue.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.