How To Fix CL479 - Only one object can be used in this mode

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 479

• Message text: Only one object can be used in this mode

What causes this issue?

This application can only copy one object from the search result.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Select one object to copy.
If you want to copy more than one object from the class in Variant
Configuration, you must set the <LS>Multiple selection</> indicator in
the additional data for the class.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL479 - Only one object can be used in this mode ?

  The SAP error message CL479 ("Only one object can be used in this mode") typically occurs in the context of class or object-oriented programming within the ABAP environment. This error indicates that the operation you are trying to perform is not allowed because it involves multiple objects when only one is permitted.
  Cause:
  The error can arise in several scenarios, such as:
  
  Method Calls: When you are trying to call a method that is designed to work with a single instance of a class, but you are passing multiple instances or trying to use it in a way that implies multiple objects.
  Inheritance Issues: If you are trying to use a base class method that is not designed to handle multiple derived class instances.
  Static Methods: Attempting to use a static method in a way that implies instance-level operations.
  
  Solution:
  To resolve the CL479 error, consider the following steps:
  
  
  Review the Code: Check the line of code where the error occurs. Ensure that you are only passing a single object to the method or function that is causing the error.
  
  
  Check Method Signatures: Look at the method signature to confirm that it is designed to accept only one object. If it is, ensure that you are not inadvertently passing multiple objects.
  
  
  Refactor Code: If your logic requires handling multiple objects, you may need to refactor your code. This could involve:
  
  Looping through a collection of objects and calling the method for each object individually.
  Modifying the method to accept a collection of objects if that aligns with your design.
  
  
  
  Consult Documentation: If you are using standard SAP classes or methods, refer to the SAP documentation to understand the expected usage and limitations.
  
  
  Debugging: Use debugging tools to step through your code and identify where the error is triggered. This can help you understand the flow of objects and where the issue lies.
  
  
  Related Information:
  
  ABAP Object-Oriented Programming: Familiarize yourself with the principles of object-oriented programming in ABAP, including class definitions, method calls, and instance management.
  SAP Notes and Community: Check SAP Notes for any known issues or patches related to the error. The SAP Community forums can also be a valuable resource for finding similar issues and solutions shared by other developers.
  Best Practices: Follow best practices for object-oriented design in ABAP to avoid such issues in the future, such as clear method definitions and proper encapsulation of class functionality.
  
  By following these steps, you should be able to identify the cause of the CL479 error and implement a suitable solution.