How To Fix OL670 - Supertype changed

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 670

• Message text: Supertype changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OL670 - Supertype changed ?

  The SAP error message OL670, which states "Supertype changed," typically occurs in the context of Object-Oriented Programming in SAP, particularly when dealing with Business Object (BO) types and their supertype relationships. This error indicates that there has been a change in the supertype of a business object, which can lead to inconsistencies or issues in the system.
  Cause:
  
  Change in Supertype Definition: The most common cause of this error is that the supertype of a business object has been modified. This could involve changes to the attributes, methods, or the structure of the supertype.
  Inconsistent Object References: If there are existing instances of the business object that reference the old supertype, and the supertype has been changed, it can lead to inconsistencies.
  Transport Issues: If changes to the supertype were transported from one system to another (e.g., from development to production) without the corresponding changes to the subtypes, this error may arise.
  
  Solution:
  
  Check Supertype Changes: Review the changes made to the supertype. Ensure that any modifications are compatible with the existing subtypes.
  Adjust Subtypes: If the supertype has changed, you may need to adjust the subtypes to align with the new structure of the supertype. This may involve modifying attributes or methods in the subtypes.
  Recreate Instances: If there are existing instances of the business object that are causing the error, you may need to recreate them after ensuring that the supertype and subtype definitions are consistent.
  Transport Consistency: Ensure that all relevant changes are transported together. If the supertype was changed in one system, ensure that the corresponding subtypes are also updated in the same transport request.
  Check for Dependencies: Look for any dependencies or references to the supertype in other objects or programs. Update those references as necessary.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error. SAP frequently updates its knowledge base with solutions for common issues.
  Documentation: Review the SAP documentation related to Object-Oriented Programming and Business Object modeling to understand the implications of changing supertype definitions.
  Testing: After making changes, thoroughly test the affected business objects to ensure that they function correctly and that the error does not reoccur.
  
  If the issue persists after following these steps, it may be beneficial to consult with SAP support or a technical consultant who specializes in SAP Business Objects and Object-Oriented Programming.