How To Fix DT181 - Key field & has invalid type &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 181

• Message text: Key field & has invalid type &

What causes this issue?

A string data type is used in key field <(>&<)>V1&.

System Response

Structure is not activated. Strings are managed indirectly using a
pointer.
You can only use concrete values in key fields, not references.

How to fix this error?

In the key, use only data elements, direct type entries, or structures.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT181 - Key field & has invalid type & ?

  The SAP error message DT181 typically indicates that there is an issue with the data type of a key field in a data structure or table. This error often arises when the data type of a field does not match the expected type defined in the data dictionary or when there is an inconsistency in the data model.
  Cause:
  
  Data Type Mismatch: The key field is defined with a data type that is incompatible with the expected data type in the context where it is being used.
  Incorrect Field Definition: The field may have been incorrectly defined in the data dictionary (e.g., in a table or structure).
  Inconsistent Data Model: Changes made to the data model (like changing a field type) may not have been propagated correctly throughout the system.
  Custom Code Issues: If there is custom ABAP code that manipulates this field, it may be using the wrong data type.
  
  Solution:
  
  Check Data Dictionary: Verify the data type of the key field in the data dictionary (transaction SE11). Ensure that it matches the expected type in the context where the error occurs.
  Adjust Field Definition: If the field is incorrectly defined, you may need to adjust its definition in the data dictionary. This may involve changing the data type or length.
  Review Custom Code: If there is custom ABAP code involved, review it to ensure that it is using the correct data type for the key field.
  Consistency Check: Run consistency checks on the data model to identify any discrepancies. You can use transaction SE14 to check for inconsistencies in database objects.
  Transport Requests: If the issue arose after a transport, ensure that all related objects were transported correctly and that there are no missing dependencies.
  
  Related Information:
  
  Transaction Codes: 
  
  SE11: Data Dictionary
  SE14: Database Utility
  SE80: Object Navigator
  
  
  Documentation: Refer to SAP Help documentation for more details on data types and structures.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Debugging: If the error occurs during a specific transaction or program, consider using the ABAP debugger to trace the execution and identify where the data type mismatch occurs.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or ABAP development team for further assistance.