How To Fix DT204 - Reference field &-& for &-& has incorrect type

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 204

• Message text: Reference field &-& for &-& has incorrect type

What causes this issue?

The reference field of the specified field does not have the correct
format:
A currency reference field must have format CUKY, i.e. a field of
format CURR must have a reference field of format CUKY.
A quantity reference field must have format UNIT, i.e. a field of
format QUAN must have a reference field of format UNIT.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Assign a reference field with the correct format to the field.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT204 - Reference field &-& for &-& has incorrect type ?

  The SAP error message DT204 indicates that there is a type mismatch for a reference field in your data. This typically occurs when the data type of a field does not match the expected type defined in the data dictionary or the structure of the database table.
  Cause:
  
  Data Type Mismatch: The field in question is expected to be of a certain data type (e.g., CHAR, NUMC, DATS, etc.), but the data being passed to it does not conform to that type.
  Incorrect Field Mapping: If you are using a custom program or a data transfer process (like LSMW, BAPIs, or IDocs), the mapping of fields may be incorrect.
  Inconsistent Data: The data being processed may contain unexpected values that do not match the expected format or type.
  Changes in Data Dictionary: If there have been recent changes to the data dictionary (like changes in field types), it may lead to this error if the program has not been updated accordingly.
  
  Solution:
  
  Check Data Types: Verify the data types of the fields in the data dictionary (transaction SE11) and ensure that the data being passed matches these types.
  Review Field Mapping: If you are using a custom program or data transfer tool, review the field mapping to ensure that the correct data types are being used.
  Data Validation: Implement data validation checks before processing to ensure that the data conforms to the expected types.
  Debugging: If you have access to the ABAP code, use the debugger to trace where the error occurs and inspect the values being passed to the reference field.
  Consult Documentation: Check SAP notes or documentation related to the specific transaction or program you are using for any known issues or updates.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE80 (Object Navigator), SE37 (Function Module), SE38 (ABAP Editor).
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional context.
  Data Transfer Tools: If using tools like LSMW or BAPIs, refer to their specific documentation for handling data types and mappings.
  
  By following these steps, you should be able to identify the cause of the DT204 error and implement a solution to resolve it.