How To Fix OO201 - Instances relationship &1 &2 &3: Inconsistent attribute (TYPE,REFCLSNAME)

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 201

• Message text: Instances relationship &1 &2 &3: Inconsistent attribute (TYPE,REFCLSNAME)

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO201 - Instances relationship &1 &2 &3: Inconsistent attribute (TYPE,REFCLSNAME) ?

  The SAP error message OO201 indicates that there is an inconsistency in the object-oriented programming (OOP) structure, specifically related to instances and their attributes. The message typically points to a problem with the relationship between instances of classes, where the attributes TYPE and REFCLSNAME do not match as expected.
  Cause:
  
  
  Inconsistent Data: The error often arises when there is a mismatch between the expected type of an instance and the actual type being referenced. This can happen if:
  
  An instance of a class is being referenced incorrectly.
  The class definitions or relationships have been modified without updating all related instances.
  There are issues with inheritance or polymorphism where the expected class type does not match the actual class type.
  
  
  
  Configuration Issues: Sometimes, the error can be due to incorrect configuration settings in the system that define how instances relate to one another.
  
  
  Data Corruption: In rare cases, data corruption in the database or inconsistencies in the application layer can lead to this error.
  
  
  Solution:
  
  
  Check Class Definitions: Review the class definitions and ensure that the attributes TYPE and REFCLSNAME are correctly defined and consistent across all instances. Make sure that the inheritance structure is correctly implemented.
  
  
  Validate Instances: Use transaction codes like SE11 (Data Dictionary) or SE80 (Object Navigator) to check the instances of the classes involved. Ensure that the instances are created correctly and that their attributes are set as expected.
  
  
  Debugging: If you have access to the ABAP code, you can debug the program to identify where the inconsistency is occurring. Look for places where instances are being created or modified.
  
  
  Consistency Check: Run consistency checks on the relevant objects to identify any discrepancies. This can sometimes be done through specific SAP transactions or tools designed for data consistency checks.
  
  
  Recreate Instances: If the issue persists, consider recreating the instances that are causing the problem. This can help reset any incorrect attributes.
  
  
  Consult Documentation: Review SAP documentation or notes related to the specific classes and instances you are working with. There may be known issues or patches available.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to the OO201 error. SAP frequently updates their knowledge base with solutions to common problems.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues.
  SAP Support: If the problem cannot be resolved internally, consider reaching out to SAP support for assistance.
  
  By following these steps, you should be able to identify and resolve the inconsistency causing the OO201 error in your SAP system.