How To Fix W8155 - Object & could not be instantiated

SAP Error Message - Details

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 155

• Message text: Object & could not be instantiated

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.

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message W8155 - Object & could not be instantiated ?

  The SAP error message:
  W8155: Object & could not be instantiated
  
  Cause:
  This warning message occurs when the SAP system tries to create an instance of a class (an object) but fails. The placeholder & is replaced by the class name that could not be instantiated.
  Common reasons include:
  
  The class does not exist in the system.
  The class is abstract or an interface and cannot be instantiated directly.
  The class has no public constructor or the constructor raises an exception.
  Missing or incorrect parameters when calling the constructor.
  The class is not active or has syntax errors.
  Authorization issues preventing object creation.
  Runtime errors during the instantiation process.
  
  
  Solution:
  To resolve this issue, you can take the following steps:
  
  
  Check the Class Name:
  
  Verify that the class name used in the code is correct and exists in the system (transaction SE24).
  
  
  
  Check Class Type:
  
  Ensure the class is not abstract or an interface. Only concrete classes can be instantiated.
  
  
  
  Check Constructor:
  
  Verify that the class has a public constructor method (CONSTRUCTOR) and that it does not raise exceptions.
  If the constructor requires parameters, ensure they are passed correctly.
  
  
  
  Activate the Class:
  
  Use SE24 to check if the class is active and has no syntax errors.
  
  
  
  Check Authorizations:
  
  Ensure the user running the program has the necessary authorizations to instantiate the class.
  
  
  
  Debugging:
  
  Use the ABAP debugger to step through the code where the object is instantiated to identify the exact cause of failure.
  
  
  
  Check for Runtime Errors:
  
  Look for any runtime errors or exceptions raised during instantiation.
  
  
  
  
  Related Information:
  
  Transaction SE24: Class Builder to check and maintain classes.
  Transaction SE80: Object Navigator to browse and edit development objects.
  ABAP Debugger: To analyze runtime behavior.
  SAP Notes: Search for specific SAP Notes related to the class or error message.
  Message Class W8: The message class W8 contains messages related to object handling.
  
  
  Example:
  If your code is:
  DATA obj TYPE REF TO zcl_my_class.
  CREATE OBJECT obj.
  And you get the error:
  W8155 Object ZCL_MY_CLASS could not be instantiated
  Check:
  
  Does ZCL_MY_CLASS exist and is active?
  Is it an abstract class or interface?
  Does it have a public constructor?
  Are there any exceptions raised in the constructor?
  
  
  If you provide the class name or the code snippet, I can help you analyze the problem more specifically.