How To Fix SO2_TOOL156 - The controller class & must be derived from & or &

SAP Error Message - Details

• Message type: E = Error

• Message class: SO2_TOOL - Messages for OXYGEN Page Editor

• Message number: 156

• Message text: The controller class & must be derived from & or &

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SO2_TOOL156 - The controller class & must be derived from & or & ?

  The SAP error message SO2_TOOL156 indicates that there is an issue with the controller class in your SAP application. Specifically, it means that the controller class you are trying to use does not inherit from the expected base classes. This error typically arises in the context of SAP UI5 or SAP Fiori applications where MVC (Model-View-Controller) architecture is employed.
  Cause:
  The error occurs when:
  
  The controller class you are trying to implement does not extend from the required base classes, which are usually sap.ui.core.mvc.Controller or sap.ui.core.mvc.ControllerExtension.
  There might be a typo in the class name or the class is not properly defined in the namespace.
  The class might not be loaded correctly due to issues in the module path or configuration.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Class Definition:
  
  Ensure that your controller class is correctly defined and extends from the appropriate base class. For example:
  sap.ui.define([
      "sap/ui/core/mvc/Controller"
  ], function(Controller) {
      "use strict";
      return Controller.extend("your.namespace.ControllerName", {
          // Your controller methods and properties
      });
  });
  
  
  
  
  Verify Namespace:
  
  Make sure that the namespace you are using in the extend method matches the actual path of your controller file. The namespace should correspond to the folder structure in your project.
  
  
  
  Check Module Loading:
  
  Ensure that the module is being loaded correctly. If you are using a component or a manifest file, verify that the paths are correctly set up.
  
  
  
  Clear Cache:
  
  Sometimes, browser cache or SAP UI5 cache can cause issues. Clear your browser cache or use the "Disable cache" option in the developer tools while testing.
  
  
  
  Check for Typos:
  
  Look for any typos in the class name or the path. Even a small typo can lead to this error.
  
  
  
  Debugging:
  
  Use the browser's developer tools to check for any additional error messages in the console that might give you more context about the issue.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP UI5 documentation for more details on controller classes and MVC architecture.
  SAP Community: You can search for similar issues on the SAP Community forums or ask for help if you are unable to resolve the issue.
  Version Compatibility: Ensure that you are using a compatible version of SAP UI5 or Fiori that supports the features you are trying to implement.
  
  By following these steps, you should be able to identify and fix the issue causing the SO2_TOOL156 error message.