How To Fix MODEL028 - Class '&1' outside of document model area

SAP Error Message - Details

• Message type: E = Error

• Message class: MODEL - Modeling

• Message number: 028

• Message text: Class '&1' outside of document model area

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MODEL028 - Class '&1' outside of document model area ?

  The SAP error message MODEL028 indicates that there is an issue with the class specified in the document model area. Specifically, the error message states that the class '&1' is outside of the document model area, which typically means that the class is not recognized or is not properly defined within the context of the document model being used.
  Cause:
  
  Incorrect Class Definition: The class specified may not be defined correctly in the system or may not exist in the expected namespace.
  Document Model Configuration: The document model may not be configured to include the specified class, or the class may not be part of the document model area.
  Authorization Issues: There may be authorization issues preventing access to the class or document model.
  Transport Issues: If the class was recently transported from another system, it may not have been properly imported or activated.
  
  Solution:
  
  Check Class Definition: Verify that the class specified in the error message exists in the system. You can do this by navigating to the class in the ABAP Workbench (transaction SE80 or SE24).
  Review Document Model Configuration: Ensure that the class is included in the document model configuration. You may need to adjust the configuration to include the class.
  Authorization Check: Ensure that the user has the necessary authorizations to access the class and the document model. Check the user roles and authorizations.
  Transport Validation: If the class was transported, check the transport logs to ensure that it was successfully imported and activated in the target system.
  Debugging: If the issue persists, consider debugging the process to identify where the error is occurring and gather more context about the failure.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE80 (Object Navigator) or SE24 (Class Builder) to investigate the class and its properties.
  Documentation: Refer to SAP documentation for the specific module or functionality you are working with to understand how document models are structured and configured.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the MODEL028 error and implement a solution.