How To Fix D4166 - Unknown error at method call of CREATE OBJECT {container}

SAP Error Message - Details

• Message type: E = Error

• Message class: D4 - DB2/400 specific messages

• Message number: 166

• Message text: Unknown error at method call of CREATE OBJECT {container}

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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Smart SAP Assistant

• What is the cause and solution for SAP error message D4166 - Unknown error at method call of CREATE OBJECT {container} ?

  The SAP error message D4166, which states "Unknown error at method call of CREATE OBJECT {container}," typically occurs when there is an issue with the instantiation of an object in ABAP (Advanced Business Application Programming). This error can arise from various underlying causes, and troubleshooting it may require a systematic approach. Here are some potential causes, solutions, and related information:
  Causes:
  
  Incorrect Class Name or Path: The class name specified in the CREATE OBJECT statement may be incorrect or not found in the system.
  Authorization Issues: The user executing the code may not have the necessary authorizations to create the object.
  Missing Dependencies: The class may depend on other classes or components that are not available or not activated.
  Memory Issues: Insufficient memory or resources available in the SAP system can lead to this error.
  Incorrect Parameters: If the constructor of the class requires parameters, and they are not provided correctly, it can lead to this error.
  System Configuration Issues: There may be configuration issues in the SAP system that prevent the object from being created.
  
  Solutions:
  
  Check Class Name: Verify that the class name used in the CREATE OBJECT statement is correct and exists in the system.
  Review Authorizations: Ensure that the user has the necessary authorizations to create the object. You can check this in transaction SU53 after the error occurs.
  Check Dependencies: Make sure that all dependencies of the class are available and activated. You can use transaction SE80 to check the class and its dependencies.
  Monitor System Resources: Check the system's memory and resource usage. You can use transaction ST02 (Tune Summary) or ST06 (Operating System Monitor) to monitor performance.
  Validate Parameters: If the class constructor requires parameters, ensure that they are being passed correctly and are of the expected type.
  Debugging: Use the ABAP debugger to step through the code and identify the exact point of failure. This can provide more context about the error.
  Check SAP Notes: Look for any relevant SAP Notes that might address this specific error. You can search for notes in the SAP Support Portal.
  
  Related Information:
  
  Transaction Codes: Use transactions like SE80 (Object Navigator), SE24 (Class Builder), and SE37 (Function Module) to investigate the class and its methods.
  ABAP Documentation: Review the ABAP documentation for the specific class you are trying to instantiate to understand its requirements and dependencies.
  SAP Community: Consider searching or posting in the SAP Community forums for additional insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.