How To Fix CRM_NF_WEBUI007 - Handler class &1 does not implement required interface

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_NF_WEBUI - Notification Framework Web Ui messages

• Message number: 007

• Message text: Handler class &1 does not implement required interface

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 CRM_NF_WEBUI007 - Handler class &1 does not implement required interface ?

  The SAP error message CRM_NF_WEBUI007 indicates that a handler class in the SAP CRM Web UI does not implement a required interface. This typically occurs when there is a mismatch between the expected interface and the actual implementation in the handler class.
  Cause:
  
  Missing Implementation: The handler class specified in the error message does not implement the necessary interface that the Web UI framework expects.
  Incorrect Configuration: The configuration settings in the Web UI might be pointing to the wrong handler class or there might be a typo in the class name.
  Transport Issues: If the system has recently undergone a transport, the handler class may not have been transported correctly, leading to missing implementations.
  Custom Development: If there has been custom development, the developer may have forgotten to implement the required methods of the interface.
  
  Solution:
  
  
  Check the Handler Class: 
  
  Go to the ABAP Workbench (SE80) and locate the handler class mentioned in the error message.
  Verify that the class implements the required interface. You can check this by looking at the class definition and ensuring that it includes the necessary methods defined in the interface.
  
  
  
  Implement Missing Methods: 
  
  If the class does not implement the required interface, you will need to add the necessary methods to the class. This may involve coding the methods as per the interface definition.
  
  
  
  Review Configuration: 
  
  Check the configuration settings in the Web UI to ensure that the correct handler class is being referenced. This can be done in transaction CRMC_UI_CONFIG or similar configuration transactions.
  
  
  
  Transport Check: 
  
  If the issue arose after a transport, ensure that all necessary objects were included in the transport request and that they were imported correctly into the target system.
  
  
  
  Debugging: 
  
  If the issue persists, consider debugging the Web UI application to trace where the error is occurring. This can provide insights into what is being called and why the interface is not being implemented.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or notes related to the specific version of CRM you are using. There may be known issues or additional steps required for certain configurations.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Version Compatibility: Ensure that the version of the handler class and the interface are compatible with the version of SAP CRM you are using.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.