How To Fix MODEL087 - Field for attribute '&2' of instantiated IO class '&1' changed

SAP Error Message - Details

• Message type: E = Error

• Message class: MODEL - Modeling

• Message number: 087

• Message text: Field for attribute '&2' of instantiated IO class '&1' changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MODEL087 - Field for attribute '&2' of instantiated IO class '&1' changed ?

  The SAP error message MODEL087 indicates that there has been a change in the field for an attribute of an instantiated IO (Input/Output) class. This typically occurs in the context of SAP's Business Object Processing Framework (BOPF) or when working with Business Objects in general.
  Cause:
  The error is usually triggered by one of the following scenarios:
  
  Model Changes: The underlying data model has been modified after the instance of the IO class was created. This could involve changes to the structure of the class, such as adding, removing, or altering attributes.
  Inconsistent State: The instance of the IO class is in an inconsistent state due to changes in the data model that are not reflected in the instance.
  Versioning Issues: If there are multiple versions of the model or if the application is not synchronized with the latest model changes, this error can occur.
  
  Solution:
  To resolve the MODEL087 error, consider the following steps:
  
  Check Model Changes: Review any recent changes made to the data model or the IO class. Ensure that the changes are compatible with the existing instances.
  Re-instantiate the Object: If the model has changed, you may need to re-instantiate the IO class to reflect the new structure. This can often be done by refreshing the object or reloading the data.
  Consistency Check: Perform a consistency check on the data model and the instances to ensure that they are aligned. This may involve using transaction codes or tools provided by SAP to validate the model.
  Debugging: If the issue persists, consider debugging the application to trace where the inconsistency is occurring. Look for any code that manipulates the IO class and ensure it adheres to the current model.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of the software you are using. There may be known issues or patches available that address this error.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific notes related to MODEL087. SAP frequently updates their knowledge base with solutions for common issues.
  BOPF Documentation: Review the BOPF documentation for best practices on managing IO classes and handling model changes.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the MODEL087 error and implement a suitable solution.