How To Fix W8086 - Object type & overwritten by object type & in target element

SAP Error Message - Details

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 086

• Message text: Object type & overwritten by object type & in target element

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W8086 - Object type & overwritten by object type & in target element ?

  The SAP error message:
  W8086 Object type & overwritten by object type & in target element
  typically occurs during data transfer or data migration processes, such as when using tools like LSMW (Legacy System Migration Workbench), BAPI calls, or IDocs, where an object type in a target structure or element is being overwritten by another object type.
  
  Cause
  
  Object Type Conflict: The error indicates that in the target structure (e.g., a data element, field, or segment), an object type that was initially assigned is being overwritten by a different object type. This usually happens when the mapping or data transfer logic tries to assign a different object type to the same target element.
  Incorrect Mapping or Data Definition: The source and target object types do not match or are inconsistent. For example, the target element expects a certain object type (e.g., a data element or structure), but the incoming data or mapping tries to assign a different object type.
  Metadata or Repository Inconsistency: Sometimes, the underlying metadata definitions in the ABAP Dictionary or the data transfer object definitions are inconsistent or corrupted.
  Custom Code or User Exit: Custom enhancements or user exits might be incorrectly manipulating the object types during data processing.
  
  
  Solution
  
  
  Check the Mapping:
  
  Review the mapping rules or transformation logic where the target element is assigned.
  Ensure that the object type assigned to the target element is consistent and not overwritten by another conflicting object type.
  In LSMW or other migration tools, verify the field mapping and conversion rules.
  
  
  
  Verify Data Element and Structure Definitions:
  
  Use transaction SE11 to check the data element or structure of the target element.
  Confirm that the object type expected matches the source data type.
  
  
  
  Correct the Source Data or Input:
  
  Ensure that the source data being transferred matches the expected object type of the target element.
  If the source data is incorrect or inconsistent, correct it before the transfer.
  
  
  
  Check for Custom Code:
  
  If there are user exits, BAdIs, or enhancements involved, review the code to ensure it does not overwrite the object type incorrectly.
  Debug the process to identify where the object type is being overwritten.
  
  
  
  Re-import or Re-generate Metadata:
  
  If the issue is due to metadata inconsistency, try re-importing or regenerating the relevant metadata or data definitions.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to message W8086 for any known issues or patches.
  If the problem persists, consider raising a support ticket with SAP, providing detailed logs and screenshots.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SE11: ABAP Dictionary (to check data elements and structures)
  LSMW: Legacy System Migration Workbench (if used for data migration)
  SE80: Object Navigator (to check repository objects)
  SM37: Job monitoring (to check batch jobs related to data transfer)
  
  
  
  Common Scenarios:
  
  Data migration from legacy systems to SAP where field mappings are complex.
  IDoc processing where segments or fields have conflicting object types.
  BAPI or RFC calls where parameter types do not match.
  
  
  
  SAP Documentation:
  
  Check SAP Help Portal for documentation on data migration and object types.
  Review SAP Notes for message class W8 (which includes message W8086).
  
  
  
  
  If you provide more context (e.g., the transaction or process where this error occurs), I can help tailor the solution further.