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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20305606 - Problem in routine CNV_20305_REFBN_CO_REFBT: Unknown type (REFBT) ?

  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 the migration cockpit or the relevant migration tool. Ensure that all data types, including REFBT, are correctly defined and mapped.
  
  
  Update Migration Objects: If you are using a standard migration object, check for any updates or notes from SAP that might address this issue. Sometimes, SAP releases notes or patches that fix known issues.
  
  
  Debugging: If you have access to the ABAP code, you can debug the routine CNV_20305_REFBN_CO_REFBT to identify where the error occurs. This may provide insights into why the REFBT type is not recognized.
  
  
  Consult Documentation: Review the SAP documentation related to the migration process you are using. There may be specific instructions or prerequisites for handling certain data types.
  
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. Provide them with the error message and any relevant details about your migration scenario.
  
  
  Related Information:
  
  SAP Notes: Search for SAP Notes related to the CNV20305606 error or the CNV_20305_REFBN_CO_REFBT routine. SAP Notes often contain fixes or workarounds for known issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide insights into handling specific data types and migration scenarios.
  Community Forums: Check SAP Community forums or other user groups where similar issues may have been discussed. Other users may have encountered the same problem and found solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.