How To Fix MODEL086 - Header table of instantiated IO class '&1' changed

MODEL086 - Overview

• Message type: E = Error

• Message class: MODEL - Modeling

• Message number: 086

• Message text: Header table of instantiated IO class '&1' changed

Self-Explanatory Message

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MODEL086 - Details

• The SAP error message MODEL086 indicates that the header table of an instantiated IO (Input/Output) class has been changed. This typically occurs in the context of SAP's Business Object Processing Framework (BOPF) or similar object-oriented programming scenarios where data consistency is crucial.
  
  Cause:
  The error usually arises due to one of the following reasons:
  
  Data Modification: The header data of the business object has been modified after it was instantiated, which violates the integrity of the object model.
  Concurrency Issues: Another transaction or user may have changed the header data while your transaction was still processing.
  Incorrect Logic: There may be a logical error in the code that leads to an attempt to access or modify the object after it has been changed.
  
  
  Solution:
  To resolve the MODEL086 error, consider the following steps:
  
  
  Check for Concurrent Modifications:
  
  Ensure that no other processes or users are modifying the same data simultaneously. Implement proper locking mechanisms if necessary.
  
  
  
  Review Code Logic:
  
  Inspect the