How To Fix OO663 - Source-based mode is not allowed when modification assistant is enabled

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 663

• Message text: Source-based mode is not allowed when modification assistant is enabled

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO663 - Source-based mode is not allowed when modification assistant is enabled ?

  The SAP error message OO663, which states "Source-based mode is not allowed when modification assistant is enabled," typically occurs in the context of using the Modification Assistant in SAP. This error is related to the way modifications are handled in the system, particularly when trying to use source-based modifications while the Modification Assistant is active.
  Cause:
  The error arises when you attempt to use source-based modifications (like modifying the source code of standard SAP objects) while the Modification Assistant is enabled. The Modification Assistant is a tool that helps manage modifications to standard SAP objects, and it restricts certain types of modifications to ensure that they can be tracked and managed properly.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Disable the Modification Assistant: If you are sure that you want to proceed with source-based modifications, you can disable the Modification Assistant. This can typically be done in the transaction code SE80 (Object Navigator) or SE37 (Function Module) by navigating to the relevant object and changing the settings.
  
  
  Use Enhancement Options: Instead of making direct source code modifications, consider using enhancement options provided by SAP, such as:
  
  User Exits
  BAdIs (Business Add-Ins)
  Enhancement Spots
  These options allow you to extend or modify the functionality of standard SAP objects without directly changing the source code.
  
  
  
  Check for Custom Development Guidelines: Ensure that your development team follows SAP's best practices for custom development. This includes using the appropriate enhancement techniques and avoiding direct modifications to standard objects whenever possible.
  
  
  Consult Documentation: Review SAP documentation or notes related to the Modification Assistant and source-based modifications for any specific guidelines or updates that may apply to your version of SAP.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP Support for assistance. They can provide guidance based on your specific system configuration and requirements.
  
  
  Related Information:
  
  Modification Assistant: A tool in SAP that helps manage modifications to standard objects, ensuring that changes are tracked and can be reverted if necessary.
  Enhancement Framework: A set of tools and techniques provided by SAP to allow for safe and manageable customizations without modifying standard code.
  SAP Notes: Regularly check SAP Notes for updates or specific instructions related to the Modification Assistant and error OO663.
  
  By following these steps, you should be able to address the OO663 error and implement your desired changes in a compliant manner.