How To Fix OO018 - &1 and &2 are not compatible. Unable to copy &3 &4

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 018

• Message text: &1 and &2 are not compatible. Unable to copy &3 &4

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 OO018 - &1 and &2 are not compatible. Unable to copy &3 &4 ?

  The SAP error message "OO018 &1 and &2 are not compatible. Unable to copy &3 &4" typically occurs in the context of object-oriented programming or when dealing with class and object management in SAP. This error indicates that there is an incompatibility between two objects or classes that you are trying to work with, such as copying or inheriting from one to another.
  Cause:
  
  Incompatible Class Types: The two classes or objects you are trying to copy or manipulate are not compatible due to differences in their definitions, such as different inheritance hierarchies or incompatible attributes.
  Different Interfaces: The classes may implement different interfaces or may not implement the required interfaces that allow for compatibility.
  Access Modifiers: There may be access restrictions (public, protected, private) that prevent the operation from being completed.
  Data Types: The data types of the attributes in the classes may not match, leading to incompatibility.
  
  Solution:
  
  Check Class Definitions: Review the definitions of the classes or objects involved. Ensure that they are compatible in terms of inheritance and interfaces.
  Modify Class Structure: If possible, modify the class structure to ensure compatibility. This may involve changing the inheritance or adjusting the attributes.
  Use Compatible Types: Ensure that the data types of the attributes in both classes are compatible. If necessary, change the data types to match.
  Review Access Modifiers: Check the access modifiers of the classes and ensure that they allow for the intended operations.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the classes or objects you are working with.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found.
  Debugging: If you have access to debugging tools, consider stepping through the code to identify where the incompatibility arises.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with a developer or SAP support for more in-depth troubleshooting.